64-slice Spiral CT Research Articles

Clinical application value of CT coronary angiography in diagnosis for coronary artery heart disease

Objective To investigate the application value of 16-slice spiral CT coronary angiography for clinic coronary artery heart disease treatment.Methods We selected a reasonable set of equipment parameters.60 cases underwent a 16-slice CT cardiac quick scan. Then we reconstructed three-dimensional coronary artery with image post-processing techniques,and observed the coronary artery images to show the location of coronary artery disease,etc. The results were compared with coronary artery angiography.Results In the 658 coronary artery segments (vessel diameter ≥ 2 mm)of 60 patients,559 were judged to be evauable by CT (87％).The scnsitivity and the specificity for the detection of stenosis ≥ 50％ were 87.5％ and 96.5 ％ respectively.When 99 coronary artery segments judged to be unevaluablem were included in the analysis,the sensitivity was 77.7％.Conclusion Coronary angiography of 16-slice spiral CT has high clinical value,it could be used for noninvasive screening and diagnosis for coronary artery heart disease. Key words: Smulti-slice spiral CT; Coronary; Coronary angiography; Three dimension reconstruction

THE DIAGNOSTIC VALUE OF THE 128-SLICE SPIRAL CT CORONARY IMAGING AND CORONARY ANGIOGRAPHY IN THE PATIENTS WITH CORONARY HEART

ObjectivesTo explore clinical diagnostic value of 128-slice spiral CT coronary angiography (128-SCTCA) in the patients with coronary heart disease, and check the population adapt to 128-SCTCA.MethodsA retrospective analysis of 198...

ONE CASE REPORT OF CONSTRICTIVE PERICARDITIS DIAGNOSED WITH 64-SLICE CT

Objectives1 Clinical data: The patient, male, 39 years old, came to our hospital with a symptoms of breathing difficulty for 5 years, being serious for 2 years, systemic oedema for...

Optimization of the scanning technique and diagnosis of pulmonary nodules with first-pass 64-detector-row perfusion VCT

ObjectiveThe aims of this study were to optimize the scanning technique of first-pass 64-detector-row perfusion volume computed tomography imaging, to evaluate the effectiveness and stability of this scan protocol, and lastly to evaluate the differential diagnosis ability of perfusion imaging in solitary pulmonary nodules (SPNs). MethodsA total of 144 patients with SPNs underwent perfusion scan with 64-slice spiral CT scanner. The CT perfusion imaging was analyzed for time–density curve, perfusion parametric maps, and the respective perfusion parameters. We then analyzed the main factors concerning the imaging quality and evaluated the effectiveness of scan protocol by determining the receiver operating characteristic (ROC) curve, diagnostic efficacy, and odds ratio as well as the stability of scan protocol by consistency analysis. Immunohistochemical findings of microvessel density measurement and vascular endothelial growth factor expression were evaluated. ResultsThe total sensitivity, specificity, accuracy, positive predictive value, negative predictive value, likelihood ratio, and the area under ROC curve during 5–45-s scan period were 78.95%, 82.4%, 80.6%, 83.3%, 77.8%, 4.620, 0.280, and 0.840, respectively, and Kappa value was 0.894. The diagnostic efficacy of CT pulmonary perfusion was significantly higher than during 0–40-s scan period. The parameter values in different nodules were different. ConclusionThe optimized 5–45-s scan period of CT pulmonary perfusion imaging is effective in pathologic diagnosis and has good stability, worthy of being popularized. Lung perfusion CT could be a promising and feasible method for differentiation of SPNs.

The significance of visfatin in patients with coronary heart disease

Objective To investigate the change of plasma visfatin in patients with coronary heart disease and its clinical significance.Methods A total of 310 patients with coronary heart disease (ACS group:n =217; SAP group:n =93) and of 90 healthy subjects with a matched age and gender were included in this study.The plasma concentration of visfatin of each subject was measured using ELISA assay,and each patient underwent selective coronary angiography examination.A total of 85 cases of patients in CHD group underwent 64-slice CT coronary imaging to evaluate the main plaque within the coronary.Results The visfatin,LDL,BMI,blood glucose levels was significantly higher in CHD group[ ( 128.18 ± 13.86)ng/ml,(3.63 ± 1.48) mmol/L,( 26.18 ± 1.82) kg/m2,(7.25 ± 2.03 ) mmol/L] than in control group [ (75.96 ± 10.27 )ng/ml,(2.64 ± 0.53 ) mmol/L,( 23.51 ± 0.89 ) kg/m2,(5.11 ± 1.53 ) mmol/L,P ＜ 0.05 ],respectively.The visfatin level in the ACS group [ ( 145.57 ± 19.95 ) ng/ml ] was significantly higher than the SAP group [ (110.79 ±7.78)ng/ml,P ＜0.05].The visfatin concentration gradually increased with the aggravation of the complexity of coronary lesion types and severity of coronary lesions( P ＜ 0.05).The plasma visfatin concentrations in Soft plaque group and the fibrous plaque group were significantly higher than calcified plaque (P ＜ 0.05).HDL-C and Gensini score of coronary lesions were negatively correlated ( r =- 0.055,P ＜0.05) ; LDL-C,Glu,and visfatin was positively correlated with coronary lesions Gensini score ( r =0.464,0.279,0.531,P ＜ 0.05 ),respectively.Conclusions The plasma visfatin level in patients with Coronary heart disease increased and affected its lipid metabolism.It may be an important inflammatory factors promoting arterial atherosclerosis occurs and development,which has a certain value to the judgment of coronary lesions and plaque stability combined with 64-slice spiral CT examination. Key words: Adipokines/blood; Coronary disease/metabolism/etiology

Clinical value of 256-slice spiral CT and selective coronary angiography for the diagnosis of coronary artery disease

Objective To explore the clinical value of 256-slice CT and coronary angiography in the diagnosis of coronary artery disease.Methods 46 patients with coronary heart disease,who underwent coronary angiography and 256-slice spiral CT were selected.Compare two methods for the detection of coronary artery disease.Results ( 1 ) All 256-slice CT and coronary angiography achieved a satisfactory image,in the diagnosis of coronary artery stenosis and occlusion,the two methods had no statistically significant difference ( P ＞ 0.05 ).(2) according to standard coronary angiography,256-slice spiral CT for the diagnosis of coronary artery stenosis sensitivity was 93.0％ (132/142),specificity was 91.6％ (142/155),positive predictive rate was 91.0％ (132/145),negative predictive rate was 93.4％ (142/152).Conclusion 256-slice spiral CT has a high time resolution,spatial resolution,the display of the coronary artery disease has high sensitivity,specificity,positive predictive value and negative predictive value. Key words: Tomography, Spiral computed; Coronary angiography; Coronary disease; Diagnosis

Clinical application of 16-slices spiral CT with 3D reconstruction in bone and joint trauma

Objective To study and assess the clinical application value of 16-slices spiral CT with 3D reconstruction for diagnosing bone and joint trauma.Methods 126 patients with bone and joint trauma were examined with 16-slice spiral CT.The volume rendering (VR) and multiple planner reconstruction (MPR) were used after treatment technology for reconstruction,and compared with digital radiography.Results For some X-ray plain films which are difficult for determining the fracture,the 3D CT can clear display,X-ray diagnosis of fractures of the rate of misdiagnosis and missed diagnosis rate reaches to 46.8％; MPR and VR 3D reconstruction images can clearly show the details of fracture,and can more clearly show a fracture of the spatial relationship.Conclusions 16-slices spiral CT with 3D reconstruction in diagnosis of traumatic fractures has the absolute advantage,can make up for the lack of X-ray plain film,decrease the misdiagnosis and missed diagnosis,and provide more extensive image information for clinic. Key words: Joint bone fracture; Three dimensional reconstruction; 16-slices spiral CT

Three-dimensional morphological characteristics of calcaneal lateral facet and calcaneal anatomical plate

Objective To explore the three-dimensional (3-D) morphological characteristics of the calcaneal lateral facet using CT image post-processing technique and the match of the calcaneal anatomic plate to the characteristics. Methods We collected the thin-slice CT data of 100 patients with normal calcaneus (50 males and 50 females) who had undergone 16-slice spiral CT scanning from December 2009 to January 2012.Surface shaded display (SSD) technique was used to reconstruct 3-D images of the calcaneus and its associated bony structures.The calcaneus was isolated by 3-D topological narrow division technique.The parameters of point,line and surface concerning the calcaneal lateral facet were measured.The fixations with conventional calcaneal anatomic plates were simulated and matches of the plates to the 3-D morphology of the calcaneus were observed. Results The mean length and height of the lateral facet,the mean height of the anterior part and the mean length of the posterior articular surface were respectively 80.4 ±3.8 mm,45.4 ± 3.0 mm,24.2 ± 2.2 mm and 29.3 ± 3.1 mm in male group and 69.5 ± 4.2 mm,36.2 ± 3.1 mm,21.1 ± 1.1 mm and 23.5 ±2.5 mm in female group.There were significant differences between the 2 groups in all the above parameters ( P ＜ 0.05).There was no significant difference in the length of anterior part between the 2 groups (male:21.3 ± 1.5 mm versus female:21.1 ± 1.1 mm) ( P ＞ 0.05).The Gissane's angle and the B(6)hler's angle were respectively 128.4° ± 11.7° and 51.2° ± 6.1 ° in male group while 124.3° ±8.6° and 58.3° ± 6.7° in female group,with significant differences between the 2 groups ( P ＜ 0.05).Match observations revealed that the plates of all kinds attached the bon facet well but some plates still needed cutting or bending. Conclusions The present study provides a series of scientific and objective data for operative protocols planned before anatomic reduction of the calcaneal fractures and orthomorphia for the malunion.A better understanding of how the calcaneal anatomic plate matches the calcaneal morphology may help orthopoedists select and locate the implant correctly. Key words: Calcaneus; Imaging, three-dimensional; Tomography, X-ray computed; Bone plates

The footprint of femoral insertion of anterior cruciate ligament three-dimensionally reconstructed by dual-source CT

Objective To measure the double-bundle footprints of the anterior cruciate ligament (ACL) three-dimensionally reconstructed by dual-source three-dimensional computed tomography (DSCT) so as to provide parameters for anatomic double-bundle ACL reconstruction in clinic.Methods This study enrolled 55 healthy volunteers,32 men and 23 women,20 to 50 years of age (average,28 years).One hundred and ten knees were scanned and processed with 64-slice spiral CT workstation (GE,Volume Share2-AW 4.4 version).The lateral wall of the intercondylar notch and the ACL femoral footprint were reconstructed three-dimensionally.The angle,length and width of the footprint,the distance between the double-bundle centers (DDBC) (anteromedial bundle and posterolateral bundle),and the distance from the footprint edge to the margin of the articular cartilage were measured.Results In this serial,the footprint angle averaged 6.8° ± 4.6°,the long footprint axis 16.8 ± 1.7 mm,the short footprint axis 7.5 ± 1.4 mm,DPCM 1.9 ± 1.0 mm,DDCM 1.5 ± 1.3 mm,and DDBC 8.0 ± 1.0 mm.There were no significant differences concerning footprint angle,long footprint axis,short footprint axis,DPCM,DDCM and DDBC between the left and the right knees in men and in women ( P ＞ 0.05) except concerning DPCM between the left and the right knees in women ( P ＜ 0.05).There were no significant differences concerning footprint angle and short footprint axis between men and women (P＞ 0.05),but there were significant differences concerning long footprint axis,DPCM,DDCM and DDBC between men and women ( P ＜ 0.05).Conclusions Measurements of femoral ACL footprints by DSCT reconstruction in normal population are reliable and representative.The footprint angle,DDBC and the distance from the footprint edge to the margin of the articular cartilage vary from individual to individual. Key words: Anterior cruciate ligament; Femur; Tomography; spiral computed

Parameters of lengthened sacroiliac screw fixation: a radiological anatomy study

To provide the anatomical basis for the feasibility and clinical practice of lengthened sacroiliac screw fixation, by measuring various related indicators of the safe insertion regions of S1 and S2 lengthened sacroiliac screws. A total of 66 healthy pelvises of adults were scanned by 64-slice spiral CT and the length, width and height of the safe insertion regions for S1 and S2 lengthened sacroiliac screw were measured. The safe screw entrance point locations were described with a quantitative method. The indicators were recorded by descriptive statistics and the statistics of left and right sides, segments of S1 and S2, and different layers (including top, middle and bottom parts) of S1 and S2 were compared. The lengths of ilium within the safe insertion regions for lengthened screws are more than 16 mm. The width and height of the safe insertion region of S1 and S2 are almost all more than 7.3 mm. Generally, the width and height of S1 are larger than those of S2. The reference ranges of the best/safest entrance point locations of lengthened sacroiliac screws are as follows-S1: 42.21-63.69 mm in front of posterior superior iliac spine, 32.77-53.75 mm above the highest point of the greater sciatic notch; S2: 22.68-54.28 mm in front of posterior superior iliac spine, 14.06-33.70 mm above the highest point of the greater sciatic notch. (1) There is anatomical feasibility for the placements of S1 and S2 lengthened sacroiliac screws. (2) φ 7.3-mm partial thread cannulated screw (thread length 16 mm) and φ 6.5-mm partial thread cancellous screw(thread length 16 mm) can be used as lengthened sacroiliac lag screw. (3) The safe insertion space of S1 is larger than that of S2. (4) There is safe space for placement of at least one piece of lengthened sacroiliac screw in both S1 and S2. (5) The best/safest entrance points of S1 and S2 can be approximately located with anatomical landmarks.

Slope on Proximal Tibiofibular Articular Surface with 3‐D Reconstruction by 64‐Slice Computed Tomography on Human

Using 64-slice spiral CT to reconstruct virtual knee joints of adults, we measured the gradient of proximal tibia-fibular joint and compared this result with bare joint measurement. We then discuss the accuracy of these measurements using a 64-slice spiral CT. Two hundred healthy adults were selected, including 100 males and 100 females, aged from 18 to 90 years. The gradient of the longitudinal axis of the fibula and the articular surface, and the angle of horizon of the proximal tibia-fibular articular surface and the horizontal line were measured by using a 64-slice spiral CT scan. The angle between the longitudinal axis of the fibula and the articular surface (angle A) was 56.80° ± 6.59°, both the left and the right fibula showed no significant difference (t = 0.308, P = 0.758). The angle between horizontal line and the articular surface (angle B) was 32.80° ± 6.49°. The regression or correlation analysis findings showed that there is a negative relationship (r = -0.952, P = 0.000), and there is significant difference (t = 51.87, P < 0.01) between the angle A and the angle B. The measurement value of using 64-slice spiral CT to reconstruct the slope of proximal tibia-fibular joints has no difference compared to the measurement value of the slope of bare proximal tibia-fibular joints. It is a precise, convenient method and is easy to apply for clinical study.

Predetermination of structure surrounding duodenal papilla before EST by multi-slice spiral CT

Objective To study the predetermination value of multi-slice spiral CT for showing the major blood vessels, bile and pancreatic ducts around normal duodenal papilla before EST. Methods A 16- slice spiral CT was used to perform 28s and 68s enhanced scan for normal structures surrounding duodenal papilla in 30 subjects. Post-processing was done to the raw data with thin-slice maximum intensity projection （TSMIP） and thin-slice average intensity projection （TSAIP）, and then the structure of bile and pancreatic ducts, duodenal artery and pancreatic-duodenal conjunction were reconstructed. The reconstructed images were double-blind evaluated. Distances between papilla and upper, front, and behind edge of the pancreatic- duodenal conjunction, situation of the duodenal papilla artery and the distance from the papilla artery end to the papilla were recorded. Results After dual-phase enhanced scan, the post-processing results for the ima- ges of the surrounding structure of pancreatic and duodenal papilla were stable and the results of double-blind evaluation were consistent. Image scores of the arteries surrounding duodenal papilla and pancreatic duct at 28th second were significantly higher than those of 68th second, whereas bile duct and the ampulla structure image scores of 68th second were higher. TSMIP of local vascular structure could display anterior-superior pancreatic-duodenal artery （ASPDA） in 93.3% of the subjects, posterior-superior pancreatic-duodenal ar- tery （PSPDA） in 73.3%, inferior pancreatic-duodenal artery （IPDA） in 73.3%, duodenal-papillary artery （DPA） in 56. 7% , bile duct in 96. 7% , pancreatic duct in 90. 0% and pancreatic and duodenal parenchima in 100. 0%. The DPAs all started from PSPDA origin and down to papilla, with only 2 cases of 30 （6. 7% ） reached the upper edge of the duodenal papilla. Others showed arteries turned thin obviously at 12 mm above the papilla; the normal common bile duct can be tracked to the opening of the papilla. The Coronal Oblique TSAIP imaging showed the distance from the duodenal papilla-bile duct ending to the lower edge of the pan- creatic-duodenal upper conjunction was 15.7 ± 1.9 mm. Distance from papilla to the front edge of pancreat- ic-duodenal conjunction was 16.6 ±3.2 mm and to the behind edge was 1.7 ±0.4 mm. Distance （depth） from the inner edge of the papilla to the bile-pancreatic conjunction was 8. 0±1.7 mm. Conclusion The 3D reconstruction of the Multi-slice spiral enhancement CT Imaging can provide high quality images of relative vascular, bile-pancreatic and obvious surrounding structures to the forthcoming operation. Massive hemorrhage and perforation risks of EST can be evaluated based on the vascular distribution and directions around duodenum and pancreas and the bile duct imaging. Key words: Helical CT; Imaga reconstruction; Endoscopic sphincterotomy; Duodenal papilla major

Metallic stent implantation in the treatment of malignant tracheal stenosis under general anaesthesia

Objective To evaluate the safety and feasibility of the tracheal stent implantation for treatment of malignant tracheal stenosis under general anaesthesia. Methods Eighteen patients with malignant tracheal stenosis underwent preoperative 64-slice spiral CT scan and airway reconstruction. The stenotic sites were located in main tracheal trunk(5 patients),in right main bronchus( 1 patient),in trachea and left main bronchus (4 patients),in trachea and right main bronchus (3 patients),in main tracheal trunk and bilateral main bronchus(5 patients).The degree of stenosis was rated 51％ to 70％ in 7 cases,71％ to 90％ in 11 cases.All patients,17 patients of ASA grade 1V and 1 patient of grade Ⅲ,presented with severe dyspnea. Under general anaesthesia,implantation of metallic stent was performed through the sputum aspiration hole of the connecting tubing with DSA guidance.The NBP,ECG,RR,SaO2 of the patients were recorded and compared with t test during the entire procedure. At the end of the procedure,relief of dyspnea,complications related to anesthesia and operation were recorded. Results The success rate of stent placement was 18/18,and dyspnea was significantly relived in all patients. Slightly bloody sputum occurred in 7 cases.The stent was obstructed by sputum in 1 case,and the patient was treated with medication.There were no severe complications.The operative course were rated 11 to 9 in 17 cases,and 6 to 8 in 1 case.All 18 patients were cooperative during the procedure.Sixteen patients rated the procedure as very comfortable and 2 rated the procedure as comfortable.Respiratory rate (RR) and heart rate (HR) decreased in all patients after the operation [ ( 37.1 ± 2.8 )/min and ( 106.5 ± 14.2 ) bpm before the operation respectively,( 18.6 ± 1.4)/min and ( 73.2 ± 7.6) bpm after the operation respectively ],t =17.81 and 3.80,P ＜ 0.01.Pulse oxygen saturation ( SaO2 ) during the operation [ ( 91.2 ± 1.8 ) ％ ]increased [ (76.3 ± 8.6 )％ before the operation ] and increased further after the operation [ (94.5 ±4.3 ) ％ ],t =2.06 and 2.26,P ＜ 0.01.Blood pressure (BP) showed no changes throughout the operation (P ＞ 0.05 ).The conprehensive assessment of operation were favorable in all patients. Conclusion With careful preoperative evaluation and planning, tracheal stent implantation under general anaesthesia in patients with malignant tracheal stenosis is feasible and safe. Key words: Anesthesia, general; Tracheal stenosis ; Stents ; Radiology, interventional

Judgment of operative effect and prognosis of severe craniocerebral trauma by transcranial

Objective To observe the changes of cerebral vascular morphology and blood flow after craniocerebral trauma so as to investigate the role of transcranial Doppler sonography (TCD) combined with CT angiography (CTA) in judgment of the operative effect and prognosis of severe craniocerebral trauma. Methods A total of 56 patients with craniocerebral trauma were monitored dynamically by using TCD before and after surgery.Dynamic CTA of head was also performed by using 128-slice spiral CT. Results TCD and CTA indicated that both the cerebral blood flow and vascular morphologychanged after craniocerebral trauma.CTA manifested mainly the vascular displacement or angiostegnosis and TCD showed mainly the high-resistance blood flow,indicating good operative effect.For the patients with vasospasm,the TCD manifested high-resistance flow (relatively good operative effect) or flow(mostly poor operative effect). The patients with vascular occlusion were associated with nail flow on TCD,with poor operative effect. Conclusions TCD shows the velocity of cerebral blood flow and CTA shows the morphological change of cerebral vessels.Thereby,the combination of TCD and CTA can effectively judge the cerebral perfusion and provide a promising way for validating the operative effect and prognosis of craniocerebral trauma. Key words: Craniocerebral trauma; Ultrasonography; Doppler, transcranial; Prognosis

Three-dimensional reconstruction of the femoral footprint of anterior cruciate ligment by dual-source CT

Objective To reconstruct three-dimensional femoral footprint of the anterior cruciate ligament (ACL) by dual-source CT (DSCT),which can provide a novel positioning system particularly applicable in the anatomic ACL reconstruction under arthroscopy. Methods DSCT scanning was performed for the bilateral knees of 30 healthy volunteers.Three-dimensional reconstruction of the lateral wall of the intercondylar notch was done with 64-slice spiral CT workstation (GE,Volume Share2-AW 4.4 version).Double-bundle footprints of the ACL femoral insertions were identified, outlined and marked on the three-dimensional models.The over-the-top junction of the distal femur and the trochlea of femoral lateral condyle was dotted as a reference point O.The femoral footprint long and short axes,the footprint angle between the line passing through 2 centers of anteromedial and posterolateral bundles and the femoral shaft,the distance between 2 bundle centers,the shortest distance from the footprint edge to the distal femoral cartilage,and the shortest distance from the footprint edge to the posterior margin of the femoral cartilage were measured on the models with a standardized scale. Results All the ACL femoral footprints were successfully reconstructed by DSCT in the 60 knee joints.They were relatively protruding,plain,irregular in shape but identical in grey scale,distinct areas on the image. On the three-dimensional models of femoral lateral condyle,a 3-point-2-angle positioning system applicable in arthroscopic anatomic ACL reconstruction was successfully established and used to define and describe the double-bundle insertions of ACL.The mean long and short axes of ACL femoral footprint were respectively 16.5 ± 1.8 mm and 8.0 ± 1.3 mm; the mean ACL footprint angle was 8.3° ±4.9°; the mean distance between 2 bundle centers was 7.8 ± 1.0 mm; the mean shortest distance from the footprint edge to the distal femoral cartilage was 1.6 ± 1.5 mm; the mean shortest distance from the footprint edge to the posterior margin of the femoral cartilage was 1.7 ± 0.9 mm. Conclusions Three-dimensional ACL femoral footprints can be clearly reconstructed with DSCT.Natural ACL femoral footprints vary from person to person,which indicates a need of individualized reconstruction in order to restore the anatomy in maximum.The 3-point-2-angle positioning system we have developed is just suitable for arthroscopic ACL reconstruction. Key words: Anterior cruciate ligament; Femur; Tomography, spiral computed

Value of full brain 256-slice spiral CT perfusion imaging combined with CTA in acute brain infarction

Value of full brain 256-slice spiral CT perfusion imaging combined with CTA in acute brain infarction

Utility of CT Perfusion Imaging for Grading of Clear Cell Renal Cell Carcinoma

Objective: To investigate the correlation between 64-slice spiral CT perfusion imaging of clear cell renal cell carcinoma (CCRCC) and Fuhrman’s nucleus grading. Methods: A total of 54 cases of pathologically confirmed CCRCC were consecutively included, and underwent 64-slice spiral CT perfusion imaging. The perfusion fraction (PF) of the contralateral and ipsilateral part of kidney and the tumor was measured respectively. The peak enhancement intensity (PEI) and blood volume (BV) were measured as well. T-test was performed in PF, BV and PEI value between contralateral kidney and CCRCC, between low-grade and high-grade CCRCC. Receiver operating characteristic (ROC) curves were used to evaluate the diagnostic performance of PF and BV in distinguishing clear cell carcinoma with different grade. The diagnostic accuracy of PF and BV was also tested after conventional CT screening. Results: There were significant differences in PF, PEI and BV between the contralateral kidney and renal cell carcinoma (p 0.05). Single or combined use of the PF and BV showed low accuracy in grading of clear cell carcinoma. The diagnostic accuracy of PF and BV in clear cell carcinoma will be improved by the combination of the perfusion CT and routine CT application. Conclusion: PF and BV values are significantly higher in high-grade CCRCC than in low-grade CCRCC, and their application will increase the accuracy for detecting high-grade CCRCC than conventional CT scan alone.

Value of 64-slice spiral CT triple-phase enhanced scanning for preoperative evaluation of lymph node dissection in patients with gastric cancer

Value of 64-slice spiral CT triple-phase enhanced scanning for preoperative evaluation of lymph node dissection in patients with gastric cancer

Clinical application and technique of 64-slice spiral CT subtraction angiography in head and neck

To discuss the technique of 64-slice spiral CT subtraction angiography (64-SCTSA) in head and neck, and evaluate its clinical application. 84 patients suspected of head-neck vascular diseases were examined with 64-SCTSA. The examination techniques, image quality and clinical application were retrospectively analyzed, and the diagnoses of 64-SCTSA were compared with those of surgery or DSA. Eighty-four subjects were successfully examined with 64-SCTSA, whose scanning and imaging parameters are effective. Image quality was excellent in 51 cases (60.7 %), good in 29 (34.5 %) and acceptable in 4 (4.8 %). In the 84 subjects, 79 cases were found abnormal in blood vessel (58 in head and 21 in neck), of which 57 were confirmed by surgical operation or digital subtraction angiography (DSA). 64-SCTSA is a feasible technique with satisfactory image quality and has the advantages of showing the lesions of vasculature without shelter from bone. It can improve the diagnostic accuracy in head-neck vascular diseases.

Clinical value of coronary culprit lesion score determined by 64-slice spiral CT scanning in diagnosing acute coronary syndrome

Clinical value of coronary culprit lesion score determined by 64-slice spiral CT scanning in diagnosing acute coronary syndrome