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Applications of corrected standard uptake value in peripheral solitary pulmonary lesions

Weishan ZHANG ; Jian YANG ; Xiaoyi DUAN ; Yan LI ; Hongxia MA ; Yuan ZHU ; Youmin GUO

Journal of Practical Radiology.2014;(5):759-762,782. doi:10.3969/j.issn.1002-1671.2014.05.011

Objective To evaluate the use of corrected standard uptake value(SUV)in patient with peripheral solitary pulmonary lesion and the relationship between corrected SUV and the lesion's size.Methods This retrospective study included 69 patients with peripheral solitary pulmonary lesions seen on PET and CT scans whose diagnoses were confirmed by pathology.Each lesion’s FDG uptake was quantified by using two methods:the SUV and the corrected SUV.The lesion’s size was recorded on CT.Results The diagnostic accuracy was 88.7% and 98.5% for PET/CT and combining corrected SUV with CT respectively.There was a positive correlation between SUV,corrected SUV and the size of lesions(r 1 =0.536,P <0.001;r 2 =0.637,P <0.001).Conclusion Measur-ing corrected SUV appears to improve the accuracy of FDG PET/CT for characterization of peripheral solitary pulmonary lesions . The volume of lesion may potentially affect the value of SUV.

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Comparative Study of 64-slice VCT Coronary Angiography and Catheter Coronary Angiography in Diagnosing Coronary Artery Disease

Jianping GUO ; Xingli ZHU ; Siyuan YAO ; Pengyi XING ; Jing HUANG

Journal of Practical Radiology.2009;25(12):1745-1747,1764. doi:10.3969/j.issn.1002-1671.2009.12.015

Objective To evaluate the diagnostic value of 64-row VCT coronary angiography(CTA) in diagnosing coronary artery disease.Methods 64-row VCT coronary angiography(CTA) and cathter coronary angiography(CAG) were performed in 173 patients with suspected coronary artery disease.All images were analysed at GE AW4.3 workstation,the constructed images included maximum intensity projection(MIP),mlti-planar reconstruction(MPR) and volume rendering(VR).The results were compared with that of CAG.Results 746 segments of coronary artery with diameter ＞1.5 mm were showed by CTA in 173 patients.The sensitivity,specificity,positive predictive value and negative predictive value of the CTA in detecting coronary arterial stenosis were 94.15%(193/203),95.90% and 89.77% and 97.90% respectively.Statistical analysis using a 2-related χ~2 test showed that there were no obvious differences in diagnosing coronary arterial stenosis between CTA and CAG(χ~2=1.58,P＞0.05) and in evaluating the stenosis degree of coronary artery(Kappa=0.890,P＜0.001).Conclusion 64-row VCT has important clinical value in screening coronary arterial disease and in following-up post operational effectiveness of coronary stent implantation and vascular bypass.

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Peripheral Pulmonary Neuroendocrine Carcinoma:Multi-slice Spiral CT Diagnosis

Jianfeng YANG ; Boyin WANG

Journal of Practical Radiology.2009;25(12):1742-1744,1752. doi:10.3969/j.issn.1002-1671.2009.12.014

Objective To evaluate the diagnostic value of MSCT in peripheral pulmonary neuroendocrine carcinoma.Methods CT findings of 42 peripheral pulmonary neuroendocrine carcinoma confirmed pathologically were compared among different pathological types.Results As for lymphatic metastases,small cell carcinoma was more commom than other pathological types(P＜0.05).Most of peripheral pulmonary neuroendocrine carcinoma had homogeneous density(29 cases) and was lobulated(30 cases).The specula sign,vessel convergence sign,pleural indentation sign and obstructive pneumonia in this group were rare(8 cases,4 cases,7 cases,8 cases respectively).Most lesions had enhancement lightly.CT values of the lesions and the enhanced degree were similar in different pathological types and there was no difference among them(P＞0.05).Conclusion msct is of definitive value in diagnosis or differentitating diagnosis in the different pathological types of peripheral pulmonary neuroendocrine carcinoma.

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Comparative Analysis of Spiral CT and Pathology of Nodular Goiter

Songhua ZHAN ; Xi ZHAO ; Wenli TAN ; Shuohui YANG ; Ruixin CHENG

Journal of Practical Radiology.2009;25(12):1720-1723,1752. doi:10.3969/j.issn.1002-1671.2009.12.008

Objective To study spiral CT features and pathological basis of nodular goiter ,so that to improve the diagnostic accuracy of nodular goiter.Methods CT findings in 34 patients with nodular goiter confirmed by pathology were retrospectively analyzed and compared with pathological findings. Results Thyroid density in the patients with NG was lower than that in the normal. There was no statistically significant difference in the density between single and multi-NG. Most lesions(28/34) were multiple, round or oval, with different size and smooth edges. The density of majority lesions was lower than nearby normal tissue. Most lesions (27/34) were uniform in density. Central necrosis(5/34)often appeared in the bigger lesions(diameter＞3.0 cm). The CT value of the lesions was increased (47.1±42.2) HU after enhancement,but lower than surrounding thyroid tissue. Calcifications in the lesions(6/34)were puncticular,plaque or crustiform. Single or multiple cystic-solid or solid nodules could be seen in pathology, without a continuous capsule in the majority. Some patients (5/13) with single NG shown on imaging study were multi-NG in the pathology. Three cases of diffuse NG showed by CT were malignant in pathology. Conclusion There are certain characteristics for NG on spiral CT. Comprehensive evaluation may improve the accuracy of CT diagnosis.

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The Value of Fast FLAIR on MRI of Intraspinal Canal Disease

Alai ZHAN ; Hongying LI ; Yushuang CHEN ; Mingfu LU ; Qingwen HUANG ; Yinghong HONG

Journal of Practical Radiology.2001;17(1):1-3.

Objective:To evaluate the usefulness of fast FLAIR pulse sequence in the MRI of intraspinal canal disease.Methods:Forty-four patients with suspected intraspinal canal disease were imaged with fast FLAIR pulse sequence after routine T1 and T2 weighted imaging in a 0.5 T superconducting MR scaner.The parameters of FLAIR were TR/TI/TE=6000/1500～2000/90～120 ms.Results:There were 26 intraspinal extramedullary tumors,4 intramedullary tumors,11 myelitis,3 localized ischemic necrosis or malacia of spinal cord.The images of FLAIR pulse sequence clearly detected all lesions of the 44 cases.They were superior to routine T2 weighted images in demonstrating the extent of the lesions and their T2 signal character,expecially in inflammatory disease of spinal cord.Conclusion:FLARI is a very useful pulse sequence in the MRI of intraspinal canal disease,it may be use as an important supplement of routine T2 weighted sequence.

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Value of DSA in Diagnosis of Intestinal Vascular Malformation

Xiping LIU ; Lixin WANG

Journal of Practical Radiology.2001;17(1):41-43.

Objective:To evaluate the value of DSA in diagnosis of intestinal vascular malformation.Methods:The clinical and DSA characters in 8 patients with small intestinal malformation were analyzed.There were 6 males and 2 females.All patients were underwent selective and supper selective superior mesenteric inferior mesenteric or colic artery angiographies.Results:The clinical fectures:1)the main sympton is acute lower gastrointestinal bleeding;(2)the results of conventional examination were generally negative;(3)the hemoglobin was dropped down to 4～6 g/ml in a short period.DSA feactures included:(1)artery-vein fistula;(2)markedly stainning in local small intestinal walls;(3)abnormal hyperplasia and distubance of small vessels.Conclusion:DSA is the most valuable method in diognosis of atute intestinal bleeding.

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CT and Clinical Analysis of Fracture of Paranasal Sinuses in 300 Cases

Xingya DU ; Jingli WANG ; Zhongzheng QI ; Qichang TIAN ; Qiang LI ; Yan LI

Journal of Practical Radiology.2001;17(1):38-40.

Objective:To evaluate the CT value in diagnosing the fracture of paranasal sinuses.Methods:The CT and clinical findings of 300 cases with fracture of paranasal sinuses were analysed retrospectively.Results:Of 300 cases,49 cases were fracture of single sinus wall,96 cases were fractures of multiple wall in single sinus and 155 cases were fracture of multiple wall in sinuses."Teardrop sign",accumulatioun of blood at sinus cavity and changes of extraoculer muscles were found.Conclusion:Sinonasal fracture can be diagnosed by CT comprehensively and accurately,that is very important in choosing the treatment methods for sinonasal fracture.

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An Analyses of X-ray Diagnosis of 13 Cases of Congenital Pulmonary Agenesis and Hypoplasia in Children

Bao CHEN ; Chen ZHAO ; Haibin GU

Journal of Practical Radiology.2001;17(1):36-37.

Objective:To evaluate the efficacy of imaging diagnisis of congenital pulmonary agenesis and hypoplasia in children.Methods:The 13 cases of congenital pulmonary agenesis and hypoplasia were veritfied by bronchcscopy and operation or pathology the characteristics of the X-ray,CT and bronchography were analysed.Results:the X-ray features included:(1)capacity decreased and density increased of diseased lung;(2)small hilar pulmonis;(3)mediastinum shifted to the affected side.Conclusion:Radiography is a good procedure in diagnosis of the most cases of congenital pulmonary agenesis and hypoplasia.

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Analysis on X-ray Manifestations and Pathogenic Factor of Chronic Renal Failure with Heart Abnormity(A Report of 87 Cases)

Dezhi MA

Journal of Practical Radiology.2001;17(1):33-35.

Objective:To improve the understanding of X-ray manifestations of chronic renal failure with heart abnormity.Methods:The X-ray manifestations and the main pathogenic factor of chronic renal failure with heart abnormity were analysed in 87 cases.Results:Cardiac enlargement of the shape was 49.4%,of which aortic type of heart was 46.5%,type of generally enlargement was 44.2%,the mixed type of generally enlargement and mitralization was 9.3%,the rate of cardiac enlargement was growed with the increase of diastolic pressure,anemia and urea nitrogen (The Ρ value was 0.01＜Ρ＜0.05;0.01＜Ρ＜0.05;0.01＜Ρ＜0.05,respectively).Conclusion:There are no characteristic X-ray manifestations in chronic renal failure with heart abnormity,the X-ray diagnosis of which must depend on clinical data.

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Unusual Mediastinal Tumors:X-ray and CT Diagnosis (A Report of 9 Cases)

Ming SHI ; Quanmou SHEN ; Lifu HE ; Xiaoxin YAO

Journal of Practical Radiology.2001;17(1):30-32.

Objective:To explore the clinical value of X-ray and CT in detecting unusual mediastinal mass.Methods:The chest plain films and CT scans were performed in all 9 cases .Results:Nine cases proved by operation and pathology included liposarcoma(two cases),multiple neurinoma(two cases),neuroendovrine cartinoma(two cases),endodermal sinus tumor(two cases)and thymas cacinoid (one case).Conclusion:X-ray and CT can localze the mediastinal mass,CT has more significance in detecting the internal morphology of mediastinal mass and its relationship with the surrounding tissues.But there is still a limitation for X-ray and CT in detecting the quality of some mediastinal carcinomas.

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