Objective To investigate the therapeutic effects of enhanced external counterpulsation (EECP) on cerebral edema and cerebral blood flow perfusion with MRI following cardiac arrest (CA) and on successful return of spontaneous circulation (ROSC) by cardiopulmonary resuscitation (CPR) in dogs.Methods Sixteen beagle dogs were induced CA with alternating current on epicardium,then were randomly (random number) divided into the EECP and control group after successful ROSC.MR scanning brain of all animals was carried out by diffusion-weighted imaging (DWI) and perfusion weighted imaging (PWI) before CA and on the first,second and third days after ROSC.Blood pressure,right common carotid artery flow,and intracranial microcirculation perfusion were measured.Results There were no significant differences in mean artery pressure at all intervals between two groups (P ＞ 0.05).There was significant increase in right common carotid artery blood flow and intracranial microcirculation of dogs in EECP group compared with the control group (P ＜ 0.05).Apparent diffusion coefficients (ADC) of water molecule on the first and third days after ROSC were significantly higher in the EECP group than those in the control group (P ＜ 0.05).Ratios of post-ROSC relative cerebral blood flow (RCBF) /original cerebral blood flow were higher in the EECP group than those in the control group on the first,second and third days after ROSC (P ＜ 0.05).Conclusions EECP treatment could improve cerebral blood flow perfusion and relieve ischemic cerebral edema,alleviating brain injury in dogs following CA and successful ROSC.

Objective To investigate CT and MRI features of hepatoblastoma in adults.Methods CT and MRI findings of 8 cases of adult hepatoblastoma were retrospectively analyzed.Results (1) 75.0％ of the tumors was located in the right lobe of the liver and 25.0％ in the left lobe of the liver.(2) The maximum diameter of the tumor was averaged at (8.2±5.5)cm,and the maximum diameter of ＞ 5 cm was 62.5％.(3) Most tumors have a complete or incomplete false envelope,and the boundary is clear.(4) 75.0％ tumors were of necrocystic degeneration with calcification or bleeding in 25.0％ cases.(5) CT flat scan showing uniform low density or low density,MRI scanning T1WI was low signal,T2WI,T2WI fat suppression and DWI were high in parenchyma.(6) To strengthen substantial part in mild and moderate arterial uneven improved or ring slightly improved,portal venous phase continued mild reinforcement,delay slow exit accounted for 75.0％,reinforced psuedocapsule was mild.(7) The adjacent organs are under pressure deformation.(8) All patients underwent tumor resection and were followed up for 3 to 24 months.Conclusions CT and MRI characteristics of hepatblastoma in adult are specific and help improve the diagnostic accuracy of the disease.

Objective:To investigate the computed tomography (CT) features of gastric neuroendocrine neoplasm (GNEN).Methods:The retrospective and descriptive method was conducted. The clinicopathological data of 30 GNEN patients who were admitted to two domestic medical centers (13 cases in Wenzhou Hospital of Traditional Chinese Medicine and 17 cases in Wenzhou People′s Hospital) from January 2010 to December 2018 were collected. There were 23 males and 7 females, aged (62±4)years, with a range from 27 to 78 years. The patients underwent abdominal CT plain scan and dynamic enhancement scan. Two associate chief radiologists with more than 20 years of work experience observed and analyzed all the images respectively. Observation indicators: (1) CT examination; (2) treatment and postoperative pathological examination; (3) follow-up. Follow-up was conducted using outpatient examination and telephone interview to detect the survival of patients up to December 2018. Measurement data with normal distribution were represented as Mean± SD. Measurement data with skewed distribution were described as M (range). Results:(1) CT examination: of the 30 patients, 14 had the tumor located in the fundus of stomach, 10 had the the tumor located in the body of stomach, and 6 had the tumor located in the antrum. The tumor was elliptical in 18 cases and irregular in 12 cases. There were 15 cases of endogenous type, 13 cases of exogenous type, and 2 cases of intramural type. Patients with G1 neuroendocrine tumor had the maximum diameter of (6.8±1.6)cm, of which 4 cases had the maximum diameter less than 5.0 cm and 4 cases had the maximum diameter of 5.0 to 10.0 cm. Patients with G2 neuroendocrine tumor had the maximum diameter of (8.3±2.7)cm, of which 1 case had the maximum diameter less than 5.0 cm, 4 cases had the maximum diameter of 5.0 to 10.0 cm, and 2 cases had the maximum diameter greater than 10.0 cm. Patients with G3 neuroendocrine carcinoma had the maximum diameter of (17.8±2.2)cm, of which 6 cases had the maximum diameter of 5.0 to 10.0 cm and 9 cases had the maximum diameter more than 10.0 cm. The tumor showed swelling growth in 14 cases and invasive growth in 16 cases. The tumor boundary was clear in 14 cases and unclear in 16 cases. CT plain scan showed homogeneous tumor density in 10 cases and heterogeneous density in 20 cases. Nine patients had iso-density in the tumor parenchymal part, and the CT value was (34.0±3.5)HU. In the 18 cases of low density, the CT value was (16.6±1.4)HU. In the 3 cases of high density, the CT value was (45.3±3.6)HU. Of the 30 patients, 21 cases had small punctate or small round necrotic cyst lesions in the tumor, 10 cases had mesenteric lymph node, peritoneum, liver metastasis and adjacent omentum invasion; 17 cases had abdominal effusion. In the CT enhancement examination, 12 cases showed mild enhancement, and the CT value was (56.5±6.3)HU; 15 cases showed moderate enhancement, and the CT value was (66.0±5.4)HU; 3 cases showed significant enhancement, and the CT value was (76.6±5.8)HU. Seven cases showed homogeneous enhancement and 23 cases had heterogeneous enhancement. There were 8 cases with tortuous vessels. (2) Treatment and postoperative pathological examination: of the 30 patients, 10 cases with mesenteric lymph nodes, peritoneum, liver metastasis and adjacent omentum invasion underwent radical total gastrectomy; 14 cases without surrounding tissue invasion or metastasis underwent radical subtotal gastrectomy; 6 cases with tumor diameter less than 4.0 cm and without surrounding tissue invasion or metastasis underwent endoscopic resection. All the 30 patients were confirmed GNEN by postoperative pathological examination, including 8 cases of G1 neuroendocrine tumor, 7 cases of G2 neuroendocrine tumor, and 15 cases of G3 neuroendocrine carcinoma. Results of immunohistochemical staining showed that 30 patients were positive for synaptophysin, 23 were positive for chromogranin A, and 9 were positive for cytokeratin. (3) Follow-up: all the 30 patients were followed up for 10-80 months, with a median follow-up time of 39 months. The 5-year survival rate of 30 patients was 43.3% (13/30). The 5-year survival rates were 6/8, 3/7 and 4/15 of patients with G1 neuroendocrine tumor, G2 neuroendocrine carcinoma, and G3 neuroendocrine carcinoma.Conclusions:GNEN has the main manifestation as abdominal pain, with G3 as pathological classification, which is common in fundus and body of stomach. The CT findings of GNEN are characterized by swelling or infiltrating growth and round or irregular low-density masses. Tumors are prone to cystic transformation, and showed the mildly to moderately heterogeneous enhancement.

Objective To investigate the CT characteristics of ectopic pheochromocytoma and improve the diagnostic accuracy. Methods The CT imaging of 27 cases with surgery and pathology proved ectopic pheochromocytoma were retrospectively analyzed, and the tumor site, size, shape, density, cystic change, calcification, boundary and strengthening characteristics of these tumors were observed. Results Tumor located in mesentery in 6 cases and in the left side of abdominal aorta in 6 cases. Tumor located in duodenal ampulla, inferior vena cava, hepatic hilum, left renal portal, right adrenal gland and bladder in 2 cases for each spot. Tumor located in right jugular foramen, left carotid body and right lower lung in 1 case for each spot. The maximum diameter of the tumor was 2.8-19.0 (6.3 ± 2.4) cm. CT plain scan showed low density in 9 cases, isodensity in 10 cases, and high density in 8 cases. CT value was 20-58 (35.0 ± 11.6) HU. Enhanced CT scan showed that the CT value was 40-96 (74.0 ± 16.4) HU, 37- 90 (63.0 ± 14.2) HU in venous phase and 35-67(55.0 ± 12.6) HU in delayed phase. In arterial phase, 15 cases showed marked enhancement in parenchyma, 5 cases showed moderate enhancement, and 7 cases showed mild enhancement. In venous phase, the degree of enhancement decreased significantly in 5 cases, slightly in 15 cases, and continued in 7 cases. In delayed phase, the degree of enhancement decreased in 20 cases and continued in 7 cases. Conclusions The CT findings of ectopic pheochromocytoma have certain characteristics, CT examination is helpful to locate and characterize ectopic pheochromocytoma and to clarify the relationship between tumor and surrounding tissue structure.

Objective:To analyze the CT and MRI features of primary hepatic sarcomatoid carcinoma.Methods:A retrospective study was conducted on 16 patients with primary hepatic sarcomatoid carcinoma who presented to Wenzhou People's Hospital of Zhejiang Province and the Second Affiliated Hospital of Wenzhou Medical University from January 2009 to June 2019. There were 8 males and 8 females, with age ranging from 35 to 71 years (average 56.8 years). The site, size, shape, margin, density of signal, adjacent tissue changes and degree enhancement of tumor were analyzed.Results:Tumors in the liver in the 16 patients were all solitary, with 11 in the right and 5 in the left liver. The maximum diameter of tumor ranged from 3 to 16cm (average 8.5cm). On plain CT scanning ( n=16), the tumors were round or oval in 6, and lobulated or irregular in 10 patients. The margins of the tumors were clear in 10 and unclear in 6 patients. All tumors showed low density, with 15 tumors showing uneven density, with necrosis and liquefaction of different sizes in the center, while 1 tumor showing uniform density. On plain MRI scanning ( n=4), four tumors had clear margins, with necrosis and liquefaction seen in the center of the tumors. The solid part showed a slightly lower signal on T 1 weighted imaging and a slightly higher signal on T 2 weighted imaging. The liquefaction focus of central necrosis showed higher signal intensity on T 2 weighted imaging. Enhanced scanning ( n=12 on CT enhancement and n=4 on MRI enhancement), the margins of the tumors were enhanced in the arterial phase. The enhancement was continued into the portal venous and delayed phases in 7 patients. Strip septate and margin enhancement in the tumor were enhanced in the arterial phase. The enhancement was continued into the portal venous and delayed phases in 7 patients. Inhomogeneous strengthening in the tumor was enhanced in the arterial phase. The enhancement was continued into the portal venous and delayed phases in 1 patient. Inhomogeneous strengthening in the tumor was enhanced in the arterial phase. The enhancement was continued into the portal venous phase. In the delayed phase, enhancement in the tumor decreased, but there was continuous enhancement of the margin and interval of the tumor in 1 patient. Conclusions:Hepatic sarcomatoid carcinoma showed dual imaging characteristics of sarcoma and cancer. The imaging features of hepatic sarcomatoid carcinoma depended on the proportion of sarcomatoid components. Large intrahepatic tumors showed necrotic cystic degeneration, moderate or significant persistent enhancement in striped septum and margin of tumor.

Objective:To explore the CT features of inflammatory pseudotumor like follicular dendritic cell sarcoma (FDCS) of the spleen.Methods:The clinical data of 12 patients with splenic inflammatory pseudotumor like FDCS admitted to 3 central hospitals including Yongjia People's Hospital in Zhejiang Province from January 2015 to December 2022 were retrospectively analyzed, including 4 males and 8 females, with a median age of 60 years old. The number, shape, size and CT features of the lesions were analyzed based on patient's CT image data.Results:CT scans of 12 patients showed 15 lesions, including 10 single lesions and 2 multiple lesions. The lesions were circular in 5 cases, elliptical in 4 cases, and irregular in 3 cases. The median maximum diameter of the mass is 6.5 cm. On plain scan, all 12 tumors showed low density or slightly low density. The CT value is (41.3±7.2) HU; 8 cases had uneven density and 4 cases had uniform density. There were 8 cases with clear tumor boundaries and 4 cases with unclear boundaries. There were 8 cases with tumor necrosis and cystic transformation, and 5 cases showed patchy bleeding lesions in the center of the tumor. Enhancement: the arterial phase shows small patches or flocculent enhancement at the edges or parenchymal parts of the tumor, with CT value of (56.0±3.8) HU. Among them, there were 7 cases of mild enhancement, 4 cases of moderate enhancement, and 1 case of significant enhancement. During the portal phase, there was mild to moderate persistent small patchy uneven enhancement, with CT value of (62.0±4.3) HU. Among them, there were 8 cases of mild enhancement and 4 cases of moderate enhancement. The delayed phase showed a slow withdrawal of enhancement, with CT value of (45.0±8.2) HU. All 12 cases underwent complete resection and were diagnosed with FDCS through pathological examination.Conclusion:FDCS plain scan shows circular or elliptical uneven low-density masses, with small patches or flocculent light to moderate uneven enhancement in the arterial phase, continuous enhancement in the portal phase, and slow withdrawal in the delayed phase as the main characteristics.

Objective:To investigate the computed tomography (CT) features of primary liver leiomyosarcoma (PHLMS).Methods:The retrospective and descriptive study was conducted. The clinical and imaging data of 10 patients with PHLMS who were admitted to 4 medical centers including 3 cases in Wenzhou Central Hospital, 3 cases in the Second Affiliated Hospital of Wenzhou Medical University, 2 cases in Wenzhou People's Hospital and 2 cases in Yueqing People's Hospital from January 2011 to December 2020 were collected. There were 5 males and 5 females, aged from 41 to 83 years, with a median age of 55 years. All 10 patients underwent abdominal CT examination. Observation indicators: (1) CT features; (2) treatment and pathological examination; (3) follow-up and survival. Follow-up using postoperative outpatient or inpatient examination to detect patient survival was conducted. Patients underwent imaging examination to detect tumor recurrence. Follow-up was up to December 2020. Measurement data with skewed distribution were represented as M (range). Count data were described as absolute numbers. Results:(1) CT features: results of CT examination showed that each of the 10 patients had only one single tumor, including 3 cases with tumor on the left lobe of liver and 7 cases with tumor on the right lobe of liver. The tumor diameter of the 10 patients was 8.0 cm(range, 4.5-13.5 cm). Results of plain CT scan of 10 patients showed that 7 cases had tumor in expansive growth as round or oval, with clear boundaries and the tumor parenchyma showing low-density signals and patchy lower density area can be seen in the center, and 3 cases had tumor in infiltrative growth as patchy, with unclear boundaries and the tumor parenchyma showing iso-density signals. The CT scan value of 10 patients was 40 HU(range, 23-47 HU). Results of enhanced CT scan at arterial phase of the 7 cases with tumor in expansive growth showed that 3 cases undergoing tumor parenchyma with uneven mild enhancement signals, 3 cases undergoing tumor parenchyma with uneven moderate enhancement signals and 1 case undergoing tumor parenchyma with uneven significant enhancement signal. The CT scan value of 7 cases was 68 HU(range, 62-88 HU). Results of enhanced CT scan at arterial phase of the 3 cases with tumor in infiltrative growth showed that the peripheral region had high signal than the central region. The CT scan value of 3 cases was 73 HU(range, 67-90 HU). Results of enhanced CT scan at portal vein phase in the 7 cases with tumor in expansive growth showed that the tumor parenchyma showing continuous and progressive mild and moderate enhancement with uneven density, and the CT scan value was 63 HU(range, 55-78 HU). Of the 7 cases, 3 cases showed the enhancement range of tumor parenchyma with the trend of fusion and filling, and 4 cases showed small patchy or nodular enhancement and grid like enhancement in the center and periphery of the tumor. Results of enhanced CT scan at portal vein phase in the 3 cases with tumor in infiltrative growth showed that the enhancement withdrew, the density was uneven, and the CT scan value was 58 HU(range, 50-62 HU). Results of enhanced CT scan at delayed phase in 10 patients showed that the enhancement in the tumor withdrew slowly, and the CT scan value was 53 HU(range, 50-60 HU). Of the 10 patients, 4 cases showed decreased density of enhanced nodules around the tumor and 6 cases showed partially fused and filled to the center of tumor with no enhancement in the necrotic part. (2) Treatment and pathological examination: all 10 patients underwent completed tumor resection successfully, and no metastasis was found in liver or the hilar region. Results of postoperative pathological examination showed that each of the 10 patients had only one single visible tumor with tumor diameter of 8.0 cm(range, 4.5?13.5 cm). Of the 10 patients, 7 cases had tumor with complete or incomplete pseudocapsule with clear boundary and 3 cases had tumor without pseudocapsule and the boundary was unclear. All 10 patients had tumor with hard parenchyma and the section was mostly gray and fish like. Among them, patchy or punctate necrosis was seen in 7 cases, small patchy or punctate hemorrhage was seen in 3 cases, and small patchy calcification was seen in 2 cases. Microscopically, the tumor tissue was crisscross, the tumor cells were in spindle shaped, the nuclei were in round, oval, blunt at both ends or in thin rod like, with obvious heteromorphism, large and deeply staining, and obviously division. Immunohistochemical staining showed positive staining of smooth muscle actin, desmin and vimentin. (3) Follow-up and survival: all 10 patients were followed up postoperatively for 6 to 130 months, with a median follow-up time of 55 months. The overall survival time of 10 patients were 10 to 120 months, with a median overall survival time of 46 months. Of the 10 patients, 2 cases died of tumor recurrence and distant metastasis 10 and 11 months after operation, respectively and 8 cases survived >12 months.Conclusions:Results of plain CT scan of PHLMS show clear or unclear cysts and solid masses with uneven density. Results of enhancement CT scan of PHLMS show persistent uneven enhancement in tumor parenchyma and the surrounding area.

Objective:To investigate the characteristics of computed tomography(CT) and magnetic resonance imaging(MRI)of focal peliosis hepatis (PH).Methods:From January 1, 2015 to December 31, 2022, a total of 8 PH patients (10 lesions) diagnosed pathologically in Yueqing People′s Hospital were collected. The location, size, and shape of the lesions, as well as the CT (4 patients with 4 lesions) and MRI (5 patients with 7 lesions) characteristics of the patients were analyzed. Descriptive method was used for statistical analysis.Results:Among the 8 PH patients, 6 patients had lesions located in the right lobe of the liver, 1 in the left lobe of the liver, and 1 (3 lesions) in both left and right lobes of the liver. Eight lesions were round or round-like, and 2 lesions were irregularly shaped. The median maximum diameter of the lesions was 4.2 cm (ranged from 2.2 to 9.3 cm), of which the maximum diameters of 2 lesions were less than 3.0 cm, those of 6 lesions were 3.1 to 5.0 cm, and those of 2 lesions were more than 6.0 cm. Nine lesions had clear boundaries, and 1 lesion had blurred boundary; 9 lesions had capsule, 1 lesion had no capsule; 1 lesion had blood vessels passing through it. The CT plain scan of 4 patients (4 lesions) showed that 3 lesions had uniform density and 3 lesions had low density, the CT enhancement showed that 2 lesions were significantly enhanced in the arterial phase, 3 lesions were sustained moderately enhanced in the portal phase, and 2 lesions were sustained mildly enhanced in the delayed phase. The MRI plain scan of 5 patients (7 lesions) showed uniform signals in 6 lesions, low signal in 3 lesions and equal signal in 4 lesions on T1-weighted images, high signal in 6 lesions on T2-weighted images, high signal in 3 lesions and equal signal in 4 lesions on diffusion-weighted images. The MRI enhancement showed that 4 lesions were significantly enhanced in the arterial phase, 5 lesions were sustained moderately enhanced in the portal phase, and 6 lesions showed sustained mild enhanced in the delayed phase.Conclusion:The PH lesions are round or round-like, with clear or unclear boundaries and uniform or uneven density, and are characterised by low density on CT and MRI plain scan, low signal on T1-weighted images, and high signal on T2-weighted images and diffusion-weighted images, and moderate or significant sustained enhancement on CT and MRI enhancement.

This paper was aimed to study medication laws of traditional Chinese medicine (TCM) towards rheumatoid arthritis (RA) based on modern medicine literatures. The China National Knowledge Infrastructure (CNKI), Wanfang Data knowledge service platform and VIP Database for Chinese Technical Periodicals were searched from January 2000 to December 2016 for relevant literatures on TCM for treatment of RA. The results showed that the database was established and the data were analyzed with statistics method including frequency analysis and cluster analysis. Finally, a total of 292 articles, 214 kinds of herbs were included, with a total frequency of 5071 for herbs. The results of frequency analysis, showed that tonic drugs, medicine for eliminating wind and dampness, drug for invigorating blood circulation and eliminating stasis were the main medications, followed by heat-cleaning drug, relieving external syndrome drug, and dampness-draining drug. The most common tastes of high frequency were sweet, pungent and bitter. The most common natures were warm and mild. The related meridians included the liver meridian, spleen meridian and kidney meridian. It was concluded that the cluster analysis showed medicines in the core group were as following: Astragalus, Licorice, Chinese angelica, Monkshood, Cassia twig, Coix seed, Radix saposhnikoviae, Radix gentianae macrophyllae, Notopterygium, Caulis spatholobi, Rhizoma ligustici wallichii, Twotooth achyranthes root, and Radix clematidis. The common combinations of RA drugs were summarized by association analysis. The medication law of RA treatment is to enrich consumptive disease and support healthy energy, to tonify the liver and kidney, to dispel wind and eliminate dampness, to remove blood stasis and dredge collaterals.

Objective To investigate the multi-slice CT (MSCT) imaging features of pancreatic neuroendocrine carcinoma (PNEC). Methods A retrospective analysis of the MSCT and pathological findings of 10 PNEC patients confirmed by surgery and pathology was performed. Results Among the 10 patients, the tumor locating at pancreatic head was in 1 case, at pancreatic body was in 1 case, and at pancreatic tail was in 8 cases. The maximum diameter was 1.8-8.5 (4.7 ± 3.6) cm. The boundary between mass and normal pancreas was unclear, among which there was a circle-like shape in 4 cases, and irregular shape in 6 cases. The plain scan showed that there were cystic changes in the mass, including cystic lesion locating in the center of the lesion in 7 cases, and that locatingd in the periphery of the lesion in 3 cases. The plain CT value was (36.0 ± 8.3) HU. The enhancement scan showed that the circumference was mainly ring enhancement, the arterial phase CT values was (78.0 ± 6.7) HU, the portal venous phase CT values was (83.0 ± 8.2) HU, and the balanced phase CT values was (69.0 ± 9.1) HU. Under the microscope, found that the tumor were made up of small cells and large cells, the tumor tissue was invasive. The atypia of tumor cells was obvious, diffuse and distribution was diffuse, with necrosis. The nuclear division was more common. The immunohistochemical result showed that synaptophysin (Syn) positive was in 10 cases, neuron-specific enolase (NSE) positive was in 7 cases, chromogranin A (CgA) positive was in 7 cases, and CD56 positive was in 6 cases; the percentage of Ki-67 expression positive cell < 3% was in 3 cases, 3%-20% was in 4 cases, and ＞20% was in 3 cases. Conclusions The MSCT imaging findings of PNEC has certain characteristics, and multi-period dynamic contrast-enhanced scan is helpful for the diagnosis of pancreatic neuroendocrine carcinoma.