Abstract:
PURPOSE:To retrospectively determine if renal cell carcinoma can be differentiated from high-attenuation renal cysts at unenhanced computed tomography (CT) based on Hounsfield unit measurements and heterogeneity. MATERIALS AND METHODS:The Human Investigation Committee at our institution approved this study with waiver of informed consent. This study was compliant with the HIPAA. Fifty-four pathologically proved renal cell carcinomas in 54 patients (36 men and 18 women; average age, 53 years; range, 23-90 years) and 56 high-attenuation renal cysts in 51 patients (30 men and 21 women; average age, 63 years; range, 28-86 years) were retrospectively evaluated at unenhanced CT. Two independent readers reviewed randomized unenhanced CT images and obtained Hounsfield unit readings of each mass. A subjective determination of lesion heterogeneity was also performed by using a four-point scale (1: homogeneous, 2: mildly heterogeneous, 3: moderately heterogeneous, 4: markedly heterogeneous). Statistical analysis was performed by using Bland-Altman regression tree, classification and regression tree, and Shapiro-Wilk normality test. RESULTS:The average attenuation of cysts for reader 1 was 53.4 HU (range, 23-113 HU) and for reader 2 was 53.8 HU (range, 21-108 HU). The average attenuation of neoplasms for reader 1 was 34.7 HU (range, 21-60 HU) and for reader 2 was 38.4 HU (range, 22-60 HU). For cyst heterogeneity, a score of 1 was given in 55 of 56 (98%) cysts for reader 1 and in 53 of 56 (95%) cysts for reader 2. For neoplasm heterogeneity, a score of 1 was given in 35 of 54 (65%) neoplasms for reader 1 and in 36 of 54 (67%) for reader 2. Given the distribution of cyst and tumor attenuation values and lesion heterogeneity, a homogeneous mass measuring 70 HU or greater at unenhanced CT has a greater than 99.9% chance of representing a high-attenuation renal cyst. CONCLUSION:The findings from this study may help differentiate high-attenuation renal cysts from renal cell carcinomas at unenhanced CT and may suggest the next appropriate imaging study for definitive characterization.
journal_name
Radiologyjournal_title
Radiologyauthors
Jonisch AI,Rubinowitz AN,Mutalik PG,Israel GMdoi
10.1148/radiol.2432060559subject
Has Abstractpub_date
2007-05-01 00:00:00pages
445-50issue
2eissn
0033-8419issn
1527-1315pii
243/2/445journal_volume
243pub_type
杂志文章相关文献
RADIOLOGY文献大全abstract::The societal and individual burden caused by acute and chronic lower extremity venous disease is considerable. In the past several decades, minimally invasive endovascular interventions have been developed to reduce thrombus burden in the setting of acute deep venous thrombosis to prevent both short- and long-term mor...
journal_title:Radiology
pub_type: 杂志文章,评审
doi:10.1148/radiol.2015132603
更新日期:2015-07-01 00:00:00
abstract::Twenty-two normal volunteers and 32 patients with either benign prostatic hypertrophy or prostatic carcinoma were examined by magnetic resonance imaging (MRI). The images were of high quality and clearly demonstrated the prostate gland and the surrounding anatomy but were of limited value in differentiating between be...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.154.1.2578070
更新日期:1985-01-01 00:00:00
abstract:PURPOSE:To evaluate the intrapatient reproducibility of the extent and anatomic distribution of air trapping at sequential expiratory thin-section computed tomographic (CT) examinations in heart-lung transplant recipients. MATERIALS AND METHODS:Nineteen heart-lung transplant recipients (eight with and 11 without bronc...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2293020827
更新日期:2003-12-01 00:00:00
abstract:PURPOSE:To investigate the utility of a free-breathing ultrashort echo time (UTE) sequence for the evaluation of small pulmonary nodules in oncology patients by using a hybrid positron emission tomography (PET)/magnetic resonance (MR) imaging system and to compare the nodule detection rate between UTE and a conventiona...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2015150489
更新日期:2016-01-01 00:00:00
abstract::A new method is presented for the removal of streaking artifact in computed tomography. The method uses a nearest-neighbor pattern recognition technique to redetermine ray sums that intersect the foreign object responsible for the streaking. When the method is applied to the removal of streaking artifact caused by lea...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.141.1.7291530
更新日期:1981-10-01 00:00:00
abstract:PURPOSE:To prospectively determine feasibility of contrast material-enhanced magnetic resonance (MR) angiography of the peripheral arteries from distal aorta to pedal arteries with a 1.0-T system and a dedicated phased-array coil. MATERIALS AND METHODS:Twenty-seven patients with peripheral arteriosclerotic occlusive d...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2351031987
更新日期:2005-04-01 00:00:00
abstract::Purpose To investigate the prognostic value of circumferential left ventricular (LV) strain measured by using cardiac MRI for prediction of major adverse cardiac events (MACE) following an acute ST-segment-elevation myocardial infarction (STEMI). Materials and Methods Participants with acute STEMI were prospectively e...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2018181253
更新日期:2019-02-01 00:00:00
abstract::Ultrasound (US) of the liver surface with a high-frequency, small-parts, short-focused probe has been proposed as a method of diagnosing cirrhosis. US of the liver was performed in 50 consecutive patients undergoing diagnostic liver biopsy to assess the clinical usefulness of this noninvasive procedure in diagnosing h...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.185.1.1523310
更新日期:1992-10-01 00:00:00
abstract:PURPOSE:To determine the accuracy of magnetic resonance (MR) cholangiography for detection of primary sclerosing cholangitis (PSC) and localization of PSC in the biliary tract. MATERIALS AND METHODS:In a prospective case-control study involving 102 patients, the MR cholangiograms obtained in 34 patients with PSC estab...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.215.1.r00ap2671
更新日期:2000-04-01 00:00:00
abstract:PURPOSE:To demonstrate the variety and recurrence patterns of severe arterial and venous thromboembolic events that occur in patients with the antiphospholipid syndrome. MATERIALS AND METHODS:Radiology records were reviewed in 800 of 1,633 patients with positive test results of antiphospholipid syndrome. Patients with...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.202.2.9015050
更新日期:1997-02-01 00:00:00
abstract::Obliteration of varicoceles in men with infertility has been shown to improve semen quality and increase fertility rates. Many current techniques involve complex procedures and specialized equipment and may be associated with adverse effects. Transcatheter thermal vessel occlusion was utilized for spermatic vein oblit...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.148.1.6856870
更新日期:1983-07-01 00:00:00
abstract::Fifty-six cases of spondylolysis were encountered in 1500 lumbar spine reports reviewed. The frequency of detecting isthmus defects on anteroposterior (AP), lateral, 45-degree right and left oblique, 30-degree up-angled AP, and collimated lateral views was determined. The collimated lateral view showed the largest num...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.153.3.6494460
更新日期:1984-12-01 00:00:00
abstract::To analyze the effectiveness and accuracy of the diagnostic process from screening mammography to final diagnosis at pathologic examination, the authors conducted a prospective study of 277 consecutive patients who underwent 291 mammographically directed biopsies of nonpalpable lesions. Of the 170 lesions that demonst...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.179.1.2006260
更新日期:1991-04-01 00:00:00
abstract::Cyst formation is an uncommon pathologic finding in heterotopic pancreas. It is sometimes reported in a duodenal location but very rarely in a gastric location and leads to very large lesions of unusual endoscopic and radiographic appearance. Two cases of gastric heterotopic pancreas are described in which cystic zone...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.169.3.3055030
更新日期:1988-12-01 00:00:00
abstract::Twenty-six patients with an eqivocal portal defect on conventional nuclear images were evaluated with a multiplane tomographic nuclear scanner and gray scale ultrasound. In most cases the correct determination (normal or abnormal) for an area of decreased uptake could be made from the multiplane tomographic scans. Whe...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/122.3.773
更新日期:1977-03-01 00:00:00
abstract::The mediassinum is a relatively uncommon site for a pancreatic pseudocyst. Two such cases are presented, along with a review of 14 additional cases from the English literature. In most cases the pseudocyst is located in the posterior mediastinum, with entry to the mediastinum via the aortic or esophageal hiatus. The m...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/123.1.37
更新日期:1977-04-01 00:00:00
abstract::The effects of cyclosporin A (CyA), an immunosuppressive agent that is potentially nephrotoxic, on the kidneys of 9 liver transplant recipients were studied with serial 99mTc-DTPA and 131I-hippuran scans. In addition, renal function was determined by measuring serum creatinine levels during the second postoperative we...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.142.1.7031760
更新日期:1982-01-01 00:00:00
abstract::The sonographic appearance in 4 cases of primary carcinoma of the gallbladder is correlated with the surgical and pathological findings. A fungating tumor had the greatest chance of resection, with findings dependent on the location and size of the mass. Infiltrating lesions were highly malignant. In less advanced cas...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.134.3.7355220
更新日期:1980-03-01 00:00:00
abstract::Normal menisci may show transient distortion during knee arthrography. This usually results from intermittent visualization of the meniscus out of direct profile to the x-ray beam. Similar transient distortion may result from actual buckling of an anatomically normal meniscus during stressful maneuvers in young indivi...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/126.1.89
更新日期:1978-01-01 00:00:00
abstract::Radiologically guided balloon catheters were used to dilate 94 gastrointestinal strictures in 92 patients over a 6-year period. Fifty strictures were esophageal and 44 nonesophageal (22 gastroenterostomies, 11 antral-pyloric strictures, four colorectal strictures, four enteroenterostomies, and three miscellaneous stri...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.165.1.3628790
更新日期:1987-10-01 00:00:00
abstract::Ultrasound-guided compression repair (UGCR) of catheterization-related femoral artery injuries was evaluated as a possible new imaging-guided interventional procedure. Thirty-nine femoral artery injuries (35 pseudoaneurysms, four arteriovenous fistulas) were detected with color Doppler flow imaging in patients with en...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.178.3.1994400
更新日期:1991-03-01 00:00:00
abstract:PURPOSE:To investigate the histopathologic and dynamic magnetic resonance (MR) imaging correlates of intrinsic susceptibility-weighted (ISW) MR imaging in patients with primary human breast adenocarcinoma and to assess the relationship between baseline transverse relaxation rate (R2*) and T2* relaxivity change (ΔR2*) a...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.10100421
更新日期:2010-12-01 00:00:00
abstract::It appears reasonable to suggest a histological diagnosis of ependymoma when CT shows an isodense tumor expanding the fourth ventricle or lying within its outlets; when the tumor contains small, round calcifications; and when presentation occurs early in life. An isodense mass occurring in the cerebral white matter, c...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.143.1.7063750
更新日期:1982-04-01 00:00:00
abstract:PURPOSE:To correlate upper gastrointestinal study findings of the position of the duodenum and duodenal-jejunal junction in children after liver transplantation with transplant type, age at transplantation, indication for transplantation, and history of surgery or malrotation. MATERIALS AND METHODS:Upper gastrointesti...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.207.1.9530320
更新日期:1998-04-01 00:00:00
abstract::Adult respiratory distress syndrome (ARDS) from overdose of tricyclic antidepressants (TCA) has been reported but is not well known. During a 1-year period, 81 patients with serious overdose from tranquilizers and other psychotropic drugs were examined. TCA alone induced overdose in 30 patients or were combined with o...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.170.3.2916020
更新日期:1989-03-01 00:00:00
abstract:PURPOSE:To assess the value of magnetic resonance (MR) imaging in the detection of postoperative complications after composite valve graft replacement. MATERIALS AND METHODS:Spin-echo and gradient-echo MR imaging was performed in 52 patients 1/2 to 200 months after composite graft replacement of the ascending aorta (2...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.212.2.r99au02573
更新日期:1999-08-01 00:00:00
abstract::The incidental radiation dose of lithium fluoride thermoluminescence dosimeters was recorded during 15 treatments of patients with auricular keloids. Two half-value layers were used, and the results were compared. In both instances, the homolateral lens and thyroid received twice the contralateral dose. The oropharynx...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.144.3.7100490
更新日期:1982-08-01 00:00:00
abstract:: Online supplemental material is available for this article. ...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiol.2020201697
更新日期:2020-10-01 00:00:00
abstract::Angiographic ablation of parathyroid adenomas with ionic contrast material was performed in 24 patients with persistent hyperparathyroidism who had undergone at least one prior unsuccessful surgical resection; 23 had mediastinal adenomas. The success rate was 83% at 1 month after ablation and 71% at both 5 and 9 years...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.165.3.3685340
更新日期:1987-12-01 00:00:00
abstract::Both carotid bifurcations were examined in 353 patients over a 20-month interval using a combination of real-time and pulsed Doppler ultrasound (duplex scanning). Angiographic correlation was available in 72 cases. Stenosis of the internal carotid was evaluated using a Doppler input frequency of 5 MHz and a scan angle...
journal_title:Radiology
pub_type: 杂志文章
doi:10.1148/radiology.154.2.3880910
更新日期:1985-02-01 00:00:00