Abstract：
PURPOSE:The purpose of this study was to assess helical and electron beam CT scanning in the evaluation of renal vein involvement in patients with renal cell carcinoma (RCC). METHOD:Seventy-three patients with 76 pathologically proven RCC who underwent surgical resection or autopsy were evaluated for the accuracy of helical and electron beam CT scanning in the detection of renal vein tumor thrombus in patients with RCC. Patients were entered into the study only if they were scanned on either electron beam or helical CT scanners with intravenous contrast medium enhancement. The tumors involved the right kidney in 38 cases and the left kidney in 38 cases, with tumor size ranging from 1.5 to 19 cm (mean 7 cm). The pathologic grade of the tumor was Grade I in 21, Grade II in 37, Grade III in 15, and Grade IV, in 3 patients. RESULTS:The accuracy of preoperative CT evaluation of the renal vein for presence or absence of tumor thrombus was 96%. The negative predictive value was 97% and the positive predictive value was 92%. Sensitivity was 85% with a specificity of 98%. In two cases we were unable to detect small intrarenal venous thrombus, although this was present on a microscopic level and did not affect surgical resection. A single false-positive CT result occurred secondary to unopacified blood flow from a capsular vein into the affected renal vein, resulting in a small flow void on CT. CONCLUSION:The data show that preoperative staging of the renal vein in the patients with RCC is effectively provided with helical and electron beam CT scanning.
journal_name
J Comput Assist Tomogrjournal_title
Journal of computer assisted tomographyauthors
Welch TJ,LeRoy AJdoi
10.1097/00004728-199705000-00024subject
Has Abstractpub_date
1997-05-01 00:00:00pages
467-71issue
3eissn
0363-8715issn
1532-3145journal_volume
21pub_type
杂志文章abstract：:This study illustrates detailed cerebral anatomy that can be consistently visualized on computed tomography scans after a rapid high dose of contrast substance has been infused. A thorough knowledge of anatomy is required not only to detect and precisely localize lesions but to avoid ascribing pathological significan...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-197904000-00001
更新日期：1979-04-01 00:00:00
abstract：:A new 6 mm collimator for the EMI CT5000/5005 scanner is described. It consists of a narrower tube side and detector side collimator that can be set up in less than 5 min. The applications are primarily for the orbit and parasellar area. Future applications with the aid of new software include coronal reconstruction. ...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-197807000-00029
更新日期：1978-07-01 00:00:00
abstract：:Segmentation of vertebral bones in computed tomographic data is important as a first stage of image-based radiological tasks. However, it is a challenging problem to segment an affected spine correctly. In this study, we propose a new method of segmentation of thoracic and lumbar vertebral bodies from thin-slice compu...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0b013e3181b12242
更新日期：2010-01-01 00:00:00
abstract：:Abnormal hyperdensity consistent with skeletal muscle calcification was shown by CT in four of eight (50%) patients with rhabdomyolysis. This finding correlated significantly with antecedent hypocalcemia (p = 0.01) and renal insufficiency (p = 0.03). In patients with rhabdomyolysis, CT can show abnormal skeletal muscl...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-199105000-00021
更新日期：1991-05-01 00:00:00
abstract：PURPOSE:To assess radiation dose reduction and image quality for weight-based chest computed tomographic (CT) examination results reconstructed using adaptive statistical iterative reconstruction (ASIR) technique. MATERIALS AND METHODS:With local ethical committee approval, weight-adjusted chest CT examinations were p...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0b013e3181b26c67
更新日期：2010-01-01 00:00:00
abstract：:In a 64-year-old female patient with verified dural venous thrombosis, postcontrast computed tomography showed dilatation of the transcerebral medullary veins, a feature that is probably pathognomonic. ...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-197908000-00020
更新日期：1979-08-01 00:00:00
abstract：OBJECTIVE:This study aimed to determine optimal strength of sinogram-affirmed iterative reconstruction (SAFIRE) and to evaluate image quality (IQ) of low-dose chest computed tomography (LDCT) using SAFIRE compared with iterative reconstruction in image space (IRIS) and filtered back projection (FBP). METHODS:Thirty pa...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0b013e31828f4dae
更新日期：2013-07-01 00:00:00
abstract：OBJECTIVE:We describe a manual segmentation and image fusion method to assess the relationship between liver tumors and the radiofrequency ablation zone depicted on cross-sectional imaging. CONCLUSIONS:Manual fusion of segmented images of hepatic tumors from a preprocedural scan with the ablation zone depicted on the ...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0b013e3181c4f797
更新日期：2010-03-01 00:00:00
abstract：PURPOSE:Our purpose was to determine what represents normal findings on MR examinations of the lumbar spine in the immediately postoperative period following lumbar laminectomy with retained Surgicel. METHOD:MR examinations were performed immediately following lumbar laminectomy in 10 patients referred for symptoms of...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-199911000-00029
更新日期：1999-11-01 00:00:00
abstract：OBJECTIVE:Our goal was to analyze the sources of nonuniform image intensity of two surface coil configurations used on a General Electric 1.5 T Signa scanner and to correct the major source. MATERIALS AND METHODS:Correction of receive coil nonuniform sensitivity is achieved using division by images of a uniform phanto...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-199411000-00033
更新日期：1994-11-01 00:00:00
abstract：:Previous reports of magnetic resonance imaging of the prostate have described a homogeneous appearance to the normal prostate gland. The T2-weighted images of the normal prostate obtained at higher field strength (1.5 T) reveal an inhomogeneous appearance of the normal gland, with apparent differentiation of normal pr...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-198611000-00017
更新日期：1986-11-01 00:00:00
abstract：PURPOSE:The graphical approach is widely used for the pixelwise determination of local metabolic rate of glucose from dynamic positron emission tomography (PET) data. In its conventional implementation, measured integrals over time frames are used to approximate instantaneous tracer concentrations at midframe times ("m...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-200307000-00026
更新日期：2003-07-01 00:00:00
abstract：OBJECTIVE:To prospectively investigate the feasibility of an 80-kilovolt (peak) (kVp) protocol in computed tomographic venography for varicose veins of the lower extremities by comparison with conventional 120-kVp protocol. METHODS:Attenuation values and signal-to-noise ratio of iodine contrast medium (CM) were determ...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0b013e3182621ea9
更新日期：2012-09-01 00:00:00
abstract：:Diffuse low attenuation lesions on CT scans are caused by various pathologic conditions, especially differences of the intratumoral matrix. Low attenuation on CT scans was more defined than fat density and less than muscle density, the so-called near water density. We present representative cases of low attenuation le...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章,评审
doi：10.1097/00004728-200009000-00018
更新日期：2000-09-01 00:00:00
abstract：:Several inconstant skull base foramina can be observed on multi-detector-row computed tomographic studies. These include the meningo-orbital foramen, foramen of Vesalius, canaliculus innominatus, palatovaginal canal, persistent craniopharyngeal canal, transsphenoidal canal, canalis basilaris medianus, and fossa navicu...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0b013e318289b370
更新日期：2013-07-01 00:00:00
abstract：:Seven patients with polypoid mucoceles of the ethmoid sinuses were examined by computed tomography (CT). The findings in all cases were remarkably similar. This unique CT appearance has not been seen with malignancies and should be considered characteristic of this benign entity. ...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-198208000-00010
更新日期：1982-08-01 00:00:00
abstract：OBJECTIVE:To investigate the hemodynamic mechanism of pseudoaneurysm in the anterior communicating artery (AcoA) area in magnetic resonance (MR) angiography. METHODS:For the clinical study, a total of 62 patients who undertook digital subtraction angiography (DSA) because of the rupture of an aneurysm originating from...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-200405000-00019
更新日期：2004-05-01 00:00:00
abstract：:A case of superficial siderosis of the central nervous system secondary to bleeding from an ependymoma is presented. High-field magnetic resonance imaging showed marginal hypointensity of the cervical cord, medulla oblongata, pons, mesencephalon, anterior cerebellar and basal cerebral surfaces, and cranial nerves (II,...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-198509000-00029
更新日期：1985-09-01 00:00:00
abstract：:We present clinical and chest computed tomography (CT) features of 5 cases of pediatric patients with 2019 novel coronavirus. Two patients had fever and dry cough, whereas the rest of 3 patients were asymptomatic. Three patients had unilateral ground glass opacities with or without consolidation in the subpleural regi...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0000000000001023
更新日期：2020-05-01 00:00:00
abstract：OBJECTIVE:This study aimed to identify the computed tomographic colonography (CTC) findings of incomplete colonoscopy compared with those of complete colonoscopy. METHODS:The clinical data and CTC imaging data from January 2004 to December 2012 were retrospectively obtained at 2 different institutions and reviewed by ...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0000000000000741
更新日期：2018-09-01 00:00:00
abstract：OBJECTIVE:We compared MRI with two-dimensional echocardiography (2dE) and Doppler echocardiography to determine the diagnostic role of MRI in hypertrophic cardiomyopathy (HCM). MATERIALS AND METHODS:Twenty-three patients with 2dE diagnosis of HCM were examined with MRI; 12 of 23 patients were also studied by color (cD...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-199311000-00005
更新日期：1993-11-01 00:00:00
abstract：:Endovascular stent grafting of abdominal aortic aneurysms is a new technique that may replace open surgery in selected cases. Pre-and postoperative angiography can be replaced by helical CT. This pictorial essay describes and illustrates the use of multislice helical CT where maximum intensity projection and multiplan...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-200107000-00013
更新日期：2001-07-01 00:00:00
abstract：PURPOSE:The goals of this work were to evaluate the practical utility of MRI to quantify myocardial mass in patients with hypertrophic cardiomyopathy (HCM), define the differences in myocardial mass measurements obtained with three-dimensional and geometric MR methods in patients with normal left ventricular morphology...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-199907000-00018
更新日期：1999-07-01 00:00:00
abstract：:We present two cases demonstrating, on CT examination, heavily calcified mass lesions associated with malignant pleural mesothelioma in workers occupationally exposed to asbestos. These masses proved to be osteogenic sarcomatous degeneration within mesotheliomas. The observation of dense calcification within a pleural...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-199601000-00009
更新日期：1996-01-01 00:00:00
abstract：PURPOSE:To investigate the optimal dual-energy reconstruction technique for the visualization of the hepatic arterial system during dual-energy multidetector computed tomographic (MDCT) angiography of the liver. MATERIALS AND METHODS:Twenty-nine nonconsecutive patients underwent dual-energy MDCT angiography of the liv...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0000000000000259
更新日期：2015-09-01 00:00:00
abstract：PURPOSE:The objectives of the study were to analyze the tumor shrinkage pattern on magnetic resonance imaging (MRI) after neoadjuvant chemotherapy and to evaluate whether there is any difference in shrinkage pattern between pathological responder and nonresponder groups. In addition, we wanted to compare tumor diameter...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0b013e318246abf3
更新日期：2012-03-01 00:00:00
abstract：:We intend to describe the imaging findings of sudden cardiac arrest occurring during computed tomographic (CT) examination and also of impending cardiogenic shock in 4 patients. Despite rare reports of acute cardiac arrest occurring during or shortly after CT scan, CT features are quite characteristic. Familiarity wit...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0b013e318250a8bc
更新日期：2012-05-01 00:00:00
abstract：OBJECTIVE:The aim of this study was to demonstrate the feasibility of whole-body diffusion tensor imaging (DTI) as a promising tool for research applications, for instance, for investigation of systemic muscle diseases. MATERIALS AND METHODS:Twelve healthy volunteers (mean age, 26.6 years; range, 20-39 years) underwen...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/RCT.0000000000000324
更新日期：2016-01-01 00:00:00
abstract：:The use of CT in the documentation of ancient Egyptian mummified human remains has previously been described in this and other journals. We recently applied this technique to a collection of ancient Egyptian mummified fauna and sarcophagi. We selected an example to illustrate that CT is also uniquely suitable for the ...
journal_title：Journal of computer assisted tomography
pub_type： 历史文章,杂志文章
doi：10.1097/00004728-198707000-00044
更新日期：1987-07-01 00:00:00
abstract：PURPOSE:Our goal was to examine the effects of collimation width (CW), pitch, viewing plane, and windowing on the display of in-plane vessels in maximum intensity projection (MIP). METHOD:A theoretical concept based on partial volume averaging of vessels was developed to describe the contents of voxels (densities) in ...
journal_title：Journal of computer assisted tomography
pub_type： 杂志文章
doi：10.1097/00004728-199611000-00018
更新日期：1996-11-01 00:00:00
