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Diagnostic Value of Hypotonic-MRCP Combined with LAVA Dynamic Contrast-Enhanced Scan in Duodenal Tumor

Tao YIN ; Yi HUAN ; Shun QI ; Yuan YUAN ; Jing HE

Journal of Practical Radiology.2010;26(4):504-506. doi:10.3969/j.issn.1002-1671.2010.04.012

Objective To discuss the value of hypotonic-MRCP combined with LAVA dynamic contrast-enhanced scan in diagnosis of duodenal tumor.Methods Five patients with duodenal adenocarcinomas confirmed by pathology were involved in this study.All cases underwent plain MRI and hypotonic-MRCP and LAVA dynamic contrast-enhanced scans.Results 4 of 5 cases were correctly diagnosed with MR imaging.Imaging signs included:the cavum of descending duodenum appeared as asymmetrical stenosis,masses with soft tissue signal intensity connecting the intestinal wall with wide base,the intestinal wall stiff,the intestinal mucosa destruction.The lesions would be slightly-moderately enhanced at LAVA dynamic enhancement scanning.Conclusion Hypotonic-MRCP combined with LAVA dynamic contrast-enhanced scan can display the direct and indirect sign of duodenal tumors,which was effective in identifying the circumscription of the tumor and its extension.

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Diagnostic Value of Enlargement of Anterior Space of the Right Branch of Portal Vein in the Early Cirrhosis at Multi-detector Row CT

Baoguo JIANG ; Hongxin WANG ; Lin LI

Journal of Practical Radiology.2010;26(4):500-503. doi:10.3969/j.issn.1002-1671.2010.04.011

Objective To evaluate the diagnostic value of enlargement of the anterior space of the right branch of portal vein in early cirrhosis.Methods 37 cases with early cirrhosis and 42 cases with type B hepatitis proved by pathology as well as 40 health cases underwent MDCT examinations.The width of the anterior space of right branch of portal vein(RBPV)and the diameters of RBPV in each group were measured on CT imaging,then the results were analysed comparatively.Results The width of anterior space of RBPV and the diameters of RBPV were(5.5±2.4)mm and(11.84±1.91)mm in health group,(13.6±5.8)mm and(12.36±61.97)mm in early cirrhosis group,(5.7±3.1)mm and(12.13±1.89)mm in type B hepatitis group,respectively.There were significant differences in the width of the anterior space of RBPV between three groups(P＜0.0001).However,there were not significant differences in the width of RBPV among these three groups(P＞0.05).While,there were significant differences of the width of the anterior space of RBPV and the diameters of the RBPV between normal control and type B hepatitis(P＞0.05).Conclusion CT sign of the anterior space of RBPV increased is of important value in diagnosis of early cirrhosis.

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Diagnostic Value of 64-slice Spiral CT Angiography in Aortic Diseases

Jianquan ZHONG ; Yong LIU ; Li LUO ; Chao YANG ; Guangjin CHENG ; Guangcai TANG

Journal of Practical Radiology.2010;26(4):496-499. doi:10.3969/j.issn.1002-1671.2010.04.010

Objective To explore the value of the 64-slice spiral CT angiography(SCTA)in diagnosis of aortic disease.Methods 32 cases with aortic diseases confirmed by operation underwent 64-slice spiral CT enhanced scan,raw data were dealed with multiplanar reformation(MPR),curved plannar reformation(CPR),maximum intensity projection(MIP),volume rendering(VR)and advantage vessel analysis(AVA).Results The aortic disease in 32 cases included aortic dissection in 16 cases,pseudoaneurysm in 7 cases,true aneurysm in 4 cases,narrowing of the aortic arch in 3 cases and amputation of aortic arch in 2 cases.The endometrial break and mural thrombus better showed with MPR and the detecting rat of intimal flake and the initial break was 81%(13/16),while for the periphery thrombosis in 7 cases with pseudoaneurysm,the detecting rate was 100%(7/7).The showing rate for displaying the whole with CR was 100%(32/32).In showing calcification and accurate of vessels with MIP,the detecting rate was 84%(27/32).The showing rate of the extent of the disease and the relationship between peripheral vascular was 100%(32/32).AVA was of significance in the measurement of vascular diameter and vascular cross-sectional area,the showing rate was 44%(14/32).Conclusion 64-slice spiral CT angiography is of significance in diagnosing aortic diseases.

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Imaging Findings of Lung Injury after Seawater Submersion: A Report of 12 Cases

Yongxin XIAO ; Weidong SHI ; Xianyong SUN ; Shixiang SHAO ; Wei CHEN ; Yuehua FENG ; Changjie DONG

Journal of Practical Radiology.2010;26(4):492-495. doi:10.3969/j.issn.1002-1671.2010.04.009

Objective To investigate imaging findings of lung injury after seawater drowning.Methods The imaging data in 12 cases with seawater drowning treated in our hospital in the past 8 years were analyzed retrospectively.Results After 2 to 12 hours of leaving the water,the initial chest X-ray examinations or CT scans were taken.The initial X-ray films displayed the lung markings increase,the small patch shadows or wide distribution patch shadows.CT showd large ground-glass density,diffuse patchy or flocculus shadows and different degress of emphysema in bilateral lung.Most of the foci were absorbed obviously in 1 to 3 days.In 1 case,the focus formed pulmonary abscess later.Conclusion X-ray and CT examinations can clearly show the severity and changes of lung damage in seawater submersion victims,and that can provide important informations for clinical diagnosis and treatment.

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Study of Morphological Characteristics of Calcified Plaques and Luminal Stenosis of Coronary Artery at 64-slice Computed Tomographic Coronary Angiography

Jinguo Lü ; Bin LU ; Xiang TANG ; Xiongbiao CHEN ; Zhihui HOU ; Shihang JIANG ; Ruping DAI ; Yongjian WU ; Shubin QIAO ; Yuejin YANG

Journal of Practical Radiology.2010;26(4):485-491. doi:10.3969/j.issn.1002-1671.2010.04.008

Objective To study the correlation between morphological characteristics of coronary artery calcified plaques and luminal stenosis of local coronary artery segments with 64-slice computed tomography.Methods One hundred and eleven patients who had undergone 64-slice computed tomographic coronary angiography(CTCA)and conventional coronary angiography(CAG)were retrospectively analyzed.The calcified plaques were classified as punctate,nodular,strip-like and nubbly in long-axis view of coronary artery lumen,and were classified as crescent,semilunar,round moon and circinate in short-axis view.The morphologic characteristics of these calcified plaques on CTCA were retrospectively analyzed and compared with luminal stenosis of CAG results.Results Among 528 calcified coronary segments which were analyzed in 111 patients,there were 383(72.5%)punctate calcified plaque segments and 145(27.5%)of non-punctate plaques.There were 34(23.4%,34/145)non-punctate calcified plaques which caused severe stenosis(≥75%),including 4(11.8%)nodular,8(23.5%)stripe-like and 22(64.7%)nubbly calcified plaques on the long-axis view,and 0(0.0%)cresent,8(23.5%)semilunar,18(52.9%)round moon and 8(23.5%)circinate calcified plaques on the short-axis view.The ratios of different morphological coronary artery calcifications which caused severe stenoses were significantly different with each other(all P＜0.01).Conclusion Different figures of coronary artery calcified plaques demonstrate different degrees of stenoses of local coronary artery lumen.Severe stenoses were mostly caused by nubbly calcified plaque on long-axis view,round moon and circinate calcified plaque on short-axis view.

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Comparative Study on the Changes of DTI and DTT of Optic Radiation and the Defect of Visual Field

Hongguang FAN ; Dapeng SHI ; Xirang GUO ; Peihong QI ; Ang XUAN ; Liya LIU

Journal of Practical Radiology.2010;26(4):481-484. doi:10.3969/j.issn.1002-1671.2010.04.007

Objective To study the relationship between the changes of diffusion tensor imaging(DTI)and diffusion tensor tractography(DTT)of optic radiation and the defect of visual field.Methods DTI and DTT were performed in 37 patients with invasion of the optic radiation by intracranial lesions and in 20 normal control group at 3.0T MR scanner,the visual fields of all cases were examined.The relativity between FA values,ADC values and mean sensitivity(MS)values,mean defect(MD)values of visual field and the relativity between the morphological change of optic radiation and the defect of visual field were analysed.Results In comparison with control group,FA values decreased and ADC values increased in subject group,there were statistically significant differences(P＜0.001)between them.In disordered group,FA values were positive correlation with MS values(r=0.718)and negative correlation with MD values(r=-0.694);ADC values were negative correlation with MS values(r=-0.625)and positive correlation with MD values(r=0.538).DTT showed that the ventral tracts of optic radiation were damaged which oppeared as the defect of ditto quadrant of bilateral field vision in 9 cases,the dorsal tracts and the lateral tracts of optic radiation were damaged which appeared as the defect of inferior quadrant of bilateral field vision in 7 cases,the optic radiations were damaged extensively that caused symmetric or asymmetric congruous hemianopia of bilateral field vision in 21 cases.Conclusion DTI and DTT of optic radiation are intimately correlated with the examined results of visual field,it will be a objective index to extimate the function and the morphological changes of optic radiation.

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MR Imaging and Proton Spectroscopic Study of Stroke-like Episodes in MELAS

Wencai HUANG ; Qunfeng TANG ; Guoxiong LI ; Lin ZHAO ; Yuheng YANG

Journal of Practical Radiology.2010;26(4):457-461. doi:10.3969/j.issn.1002-1671.2010.04.001

Objective To study the characteristics of MR imaging and proton MR spectrscopy(~1H MRS)of stroke-like lesions in MELAS.Methods Clinical,MR imaging and proton spectroscopic findings of stroke-like lesions in 7 patients with confirmed MELAS were analyzed retrospectively.Results A total of 12 MR investigations had been performed in 7 patients.Stroke-like lesions showed by MR imaging included superacute in 12,acute in 12,subacute in 10 and chronic stage in 6.Early stroke-like lesions were demonstrated as focal edematous foci mainly involved cortex/subcotical areas of occipital,temporal and parietal lobes.At MR diffusion imaging,stroke-like lesions in the superacute(＜3 days)stage were showed as well-circumscribed lesions with high signal intensities for cytotoxic edema.During the acute(4～7 days),sub-acute(2～4 weeks)and chronic(＞4 weeks)stages,the lesions gradually expanded,and became blur,and presented with vasogenic edema mainly.Proton spectroscopy showed a prominently elevated lactate,varied decrease of NAA concentration and other brain motabolites in the stroke-like lesions early after onset,and depicted gradual decrease of lactate level and partial recovery of NAA concentration subsequently.Conclusion Stroke-like lesions in MELAS mainly involve the cerebral cortex and subcortical areas,in which cytotoxic edema appears early but for a short period.In ~1H MRS,the lesions are characterized by a double lactate peak with decrease of NAA concentration.

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The Advantages of MR LAVA Sequence in Abdominal Examination at 3.0T Magneton

Qiongxin ZENG ; Junhui ZHENG ; Shaoheng TAN

Journal of Practical Radiology.2010;26(4):571-574. doi:10.3969/j.issn.1002-1671.2010.04.030

Objective To evaluate the advantages of MR LAVA multi-phase dynamic contrast enhancement in abdominal MRI.Methods 42 cases which clinically suspected liver lesions and 15 normal volunteers underwent MRI examination,including routine T_1WI and T_2WI scan,T_1W 2D and 3D FSPGR,LAV A multi-phase contrast enhancement.The detecting rates of 2D,3D and LAVA images were analysed and the signal noise ratio(SNR)of the liver and spleen was observed.Results 68 lesions were detected by LAVA sequence,the detecting rate was 100%,the accurate rate of diagnosis was 95.6%(65/68),while the detecting rates of the lesions were 91.2%(62/68)and 89.7%(61/68)with 3D T1W FSPGR and 2D T1W FSPGR,respectively,the accurate rates in diagnosing the lesions were 76.5%(52/68)and 70.6%(48/68)with 3D and 2D sequences,respectively.The SNR of liver,spleen of 15 normal volunteers were:29.68±2.31 in liver,36.21 ±3.67 in spleen at LAVA plain scan,46.21 ±5.32 in liver,58.75±4.68 in spleen at 2D T_1W FSPGR,19.79±2.23 in liver,23.63±2.14 in spleen at 3D T_1W FSPGR,41.75±5.13 in liver,57.96±6.13 in spleen at LAVA contrast enhancement,56.33±5.63 in liver,63.21±5.32 in spleen at 2D contrast enhancement,29.05±4.68 in liver,46.37±5.17 in spleen at 3D contrast enhancement sequence.Conclusion LAVA multi-phase dynamic contrast enhancement is more predominant than T1W 2D and 3D and 3D FSPGR in displaying the lesions and blood vessels of liver.

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Anatomic Assessment of Right Inferior Phrenic Artery with Multi-detector Row CT

Shining ZHANG ; Xiaoshan GUO ; Jun JIAO

Journal of Practical Radiology.2010;26(4):566-570. doi:10.3969/j.issn.1002-1671.2010.04.029

Objective To estimate the anatomic variation of the right inferior phrenic artery(RIPA)with multi-detector tomography(MDCT)scans.Methods 45 patients with hepatocellular carcinoma(HCC)and 46 healthy subjects were examined by contrast-enhanced CT scan(CTA)at 16-section CT scanner.Then the images were reconstructed with MPR,VR and MIP.Results RIPA were detected by CTA in all cases(sensitivity was 100%).The origin of RIPAs directly from the aorta in 42%,celiac trunk in 37%,right renal artery in 15%,left gastric artery in 3% and proper hepatic artery in 2%.For the reconstructive images quality,MPR and MIP were better than VR,but in showing the origin of RIPAs,MPR and VR were better than MIP.In compared with normal group,the diameters of RIPAs in tumor group were larger.Conclusion MDCT estimates well for the anatomy of RIPAs,which is significant for planning and embolization of extrahepatic RIPA supply in HCC.

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Study on the Correlation between the Appearances of DSA and Serum VEGF Expression in Cervical Cancer

Junyi XIANG ; Chenhui QI ; Fangman CHEN

Journal of Practical Radiology.2010;26(4):561-565. doi:10.3969/j.issn.1002-1671.2010.04.028

Objective To study the correlation between ths DSA manifestations and expression of serum VEGF in the patients with cervical cancer.Methods Imaging data of 40 cases with cervical cancer confirmed by clinic were collected,and DSA were performed during interventional therapy in all cases,and the serum VEGF was detected by enzyme-linked immunosorbent assay(ELISA)which was compared with that in 40 healthy women as contrast.Results(1)Serum VEGF level in the patients with cervical cancer was significantly higher than that in control group(P＜0.01),and the serum VEGF level was significantly higher in Ⅲ and Ⅳ stage of cervical cancer than that in Ⅱ stage(P＜0.05).(2)There was positive correlation between tumor stain in DSA and the serum level of VEGF(P＜0.05).Conclusion There was positive correlation between the degree of blood supply and the serum level of VEGF.

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