Diagnosis of Left Subclavian Arterial Stenosis with Multi-slice Spiral CT Angiography / 实用放射学杂志

Objective To estimate the value of MSCTA in the diagnosis of subclavian arterial stenosis.Methods 10 patients with suspected subclavian steal syndrome which causes subclavian artery stenosis underwent MSCTA, the contrast medium was Iohexol 80~90 ml, the flow rate was 3~4 ml/s with sure-star techniques,excretory-phase images were transferred to the workstation and shaded volume rendering (VR),multiplanar reconstruction(MPR),and curved planar reconstruction (CPR) were performed.The left subclavian artery was divided into proximal and distals by openning of left vertebral arteries. Results The narrowing positions:6 cases were in proximal and 4 cases were in distal of subclavian artery.6 cases were focal stenosis,4 cases were multiple stenosis and totally 14 focus.The extent of stenosis was 0.8~2.0 cm,10 cases were ≤1 cm and 4 cases were 1.1~20 cm.The degree of stenosis included 7 cases ≤50%,3 cases in 50%~70%.The results was same comparing with that of DSA.Conclusion MSCTA plays an important role in diagnosing subclavian arterial stenosis.

The Application of Multi-slice Spiral CT Angiography in the Internal Mammary Artery / 实用放射学杂志

Objective To estimate the ability of MSCTA in displaying internal mammary artery . Methods MSCTA images of clinically suspected aortic disease in 30 patients were retrospectively re-processed and analyzed.The transverse images were combined with the reorganization images to observe the running rule,length and diameter of internal mammary artery.Results 60 internal mammary arteriae were showed by MSCTA,one was maldevelopment and obvious smaller than that of the contralateral one,four in two patients were obvious circuitous and two in one patient appeared abnormal branch.All internal mammary arteries originated from the outside of the first segmental of the left and right subclavian artery respectively,and descended along the back of the upper 6 sostal cartilages,in the distance of 2 cm to the limbus of sternal border,then divided into two in the sixth intercostal space level.56 on anterior view showed straight line descent,while on lateral view,they closed to the costal cartilage and were mild-circuitous.The average length of internal thoracic arteries was:(20.11?1.85) cm in right and (20.34?1.57) cm in left, the average diameter was:(2.49?0.37) cm in right and (2.45?0.35) cm in left.Conclusion MSCTA can clearly demonstrate the internal mammary artery,which provides various kinds of information for the clinical diagnosis and treatment of certain diseases.

Evaluation of Multi-slice CT Post-processing Technique in Diagnosis of Small Peripheral Lung Cancer / 实用放射学杂志

Objective To evaluate the value of multi-slice spiral CT(MSCT)post-processing technique in diagnosis of small peripheral lung cancer .Methods CT materials with small peripheral lung cancer in 20 cases were retrospectively analyzed ,after 16-slice spiral CT scanning ,both plain and contrast ,and reconstructed using 1mm slice thickness ,the images were passing on an independent workstation for SSD and MPR technique .Results the images of SSD and MPR could reveal the relation between focus and surrounding organs in different dirctions,also revealed the features of pulmonary carcinoma stereos copically and directly,could show actually lobulated sign ,burr sign,pleural indentation sign and vessel convergence sign with small peripheral lung cancer ,the SSD imaging was superior in judging the presence of the lobulated sign .Conclusion It is very valuable for diagnosis of small peripheral lung cancer that application of SSD,MPR and two dimensional reconstruction。

The Evaluation of Spinal Injury with Multi-slice Spiral CT Post-processing Technique / 实用放射学杂志

Objective To evaluate the value of multi-slice spiral CT(MSCT) post-processing technique in diagnosis of spinal injury. Methods CT materials in 44 cases of spinal injury were retrospectively analyzed,all case were scanning with 16-slice helical CT,the images were passing on an independent workstation for MPR and SVR technique,and compared with axial 2D imaging of CT . Results MPR and SVR images could show the fracture line and displacement of fractured osseous fragments and spatial relationship of structure clearly,MPR images could show small fracture line and dislocation of joint actually. Conclusion MPR and SVR images are important supplement to axial 2D images,the axial imaging combined with various reconstruction technique can provide the space structure of spinal injury ,and play an important role in selecting therapy project and evaluating prognosis.

Clinical Evaluation of Multi-slice Spiral CT Urography in the Diagnosis of Pyelic and Uretal Disease / 实用放射学杂志

Objective To evaluate the diagnostic value of multi-slice spiral CT urography(MSCTU)in pyelic and uretal disease.Methods 46 cases of pyelic and ureter disease with integrated clinical data were collected in two years,all cases were undergone multi-slice spiral CT contrast-enhanced scanning,the excretory-phase images were transferred to the workstation and shaded volume rendering(SVR),maximun intensity projection(MIP),multiplanar reconstruction(MPR)and curved planar reconstruction(CPR)were performed.Results In 46 cases,16 pyelic and ureteral calculus,12 congenital deformitions(including pelviureteric duplication malformations,retrocaval ureters,ureteropelvic junction stenosis,supern-umerary kidneys),5 inflammatory stenosis,7 primary pyelic and ureteral cancer,4 ureters were involved by bladder cancer and 2 compressive lesion were found.Conclusion MSCTU has obvious advantage in the diagnosis of pyelic and uretal disease.