Abstract:
OBJECTIVE:Formation mechanisms and treatment of the urinary stones are different, depending on their chemical structure. Therefore, determining the stone type plays a key role in planning treatment and preventive measures. Computed tomography (CT), with the use of dual-energy technology in recent years, has made it possible to do in vivo analysis of urinary stones. In this study, we aimed to evaluate the diagnostic efficacy of dual-energy CT (DECT) and compare its results with in vitro analysis, which is accepted as a gold standard for analysis of urinary stones. MATERIALS AND METHODS:The DECT examinations were performed on 373 patients using 128-slice dual-source CT scanner. Analysis of attenuation ratios in the high and low kilovoltage peak values of the stone was performed at workstation, and stones were classified as hydroxyapatite, calcium oxalate, cystine, and uric acid. On follow-up, the stone was obtained in 35 patients as a result of surgery or passed spontaneously. The DECT analysis and in vitro analysis results were compared and statistically evaluated. RESULTS:In all patients, 136 hydroxyapatite, 160 calcium oxalate, 57 uric acid, and 20 cystine stones were detected with DECT. In vitro analyses of the stones were performed in 35 patients, and 8 hydroxyapatite, 18 calcium oxalate, 6 uric acid, and 3 cystine stones were revealed. When DECT analysis results were compared with in vitro analysis results, stone types were detected correctly in 32 (91.4%) patients and incorrectly in 3 (8.6%) patients. Especially all uric acid and cystine stones were correctly detected with DECT. CONCLUSIONS:With advanced postprocess analysis methods, DECT is able to analyze urinary stones. The DECT is found superior especially in detecting uric acid and cystine stones. Its success in detecting hydroxyapatite and calcium oxalate stones is also high. When in vivo analyses of the stones are performed with DECT, it will be possible to make a contribution to the personalization and optimization of the treatment.
journal_name
J Comput Assist Tomogrjournal_title
Journal of computer assisted tomographyauthors
Erdogan H,Temizoz O,Koplay M,Ozturk Bdoi
10.1097/RCT.0000000000000831subject
Has Abstractpub_date
2019-03-01 00:00:00pages
214-219issue
2eissn
0363-8715issn
1532-3145journal_volume
43pub_type
杂志文章abstract::The CT findings in 20 patients with pulmonary hydatid disease were reviewed. Sixty-four intrapulmonary cysts were imaged, 22% of which were ruptured or complicated. Simple hydatid cysts and water-density lung cysts of other etiology may have a similar CT appearance; however, the demonstration of the cystic nature of a...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198603000-00011
更新日期:1986-03-01 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:OBJECTIVES:Our aim was to evaluate the diagnostic accuracy of 256-slice, high-pitch mode multidetector computed tomography (MDCT) for coronary artery bypass graft (CABG) patency. METHODS:Eighty-eight patients underwent 256-slice MDCT angiography to evaluate their graft patency after CABG surgery using a prospectively ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e3182a58a8c
更新日期:2014-01-01 00:00:00
abstract:OBJECTIVES:This study aimed to assess if dual-energy computed tomography (DECT) quantitative analysis and radiomics can differentiate normal liver, hepatic steatosis, and cirrhosis. MATERIALS AND METHODS:Our retrospective study included 75 adult patients (mean age, 54 ± 16 years) who underwent contrast-enhanced, dual-...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000989
更新日期:2020-03-01 00:00:00
abstract:BACKGROUND:Neonatal hypoxic-ischemic encephalopathy (HIE) is associated with dysfunctional cerebral autoregulation. Resistive index (RI) measured in the anterior cerebral artery on transfontanellar head ultrasound is a noninvasive measure of blood flow and may indicate autoregulation dysfunction. We tested whether RI w...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000001069
更新日期:2020-09-01 00:00:00
abstract::Computed tomography (CT) has been performed in 21 patients with primary hyperparathyroidism (HPT) in an attempt to localize preoperatively the parathyroid tumors. Eighteen of these patients also had ultrasound examinations. The CT examinations included the neck and mediastinum and were performed before and after contr...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198206000-00016
更新日期:1982-06-01 00:00:00
abstract::An unusual computed tomography finding, the "target sign," is demonstrated in a patient with a corpus callosum tumor mass extending to the right lateral ventricle. The central low attenuation of the "target" is produced by the isolated part of the dilated lateral ventricle surrounded by tumor tissue, the dense area of...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1979-08-01 00:00:00
abstract:OBJECTIVES:This article describes magnetic resonance imaging (MRI) findings in 3 cases of atypical polypoid adenomyoma (APAM). METHODS:Clinical and MRI manifestations of 3 patients with APAM were evaluated. High b value diffusion-weighted and dynamic contrast-enhanced images were performed. The size, shape, site of or...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0000000000000169
更新日期:2015-01-01 00:00:00
abstract::Takayasu arteritis is a chronic inflammatory disease of unknown origin. The disease is characterized by transmural inflammation and fibrosis; the arterial lesions affect mainly the aorta and great vessels and sometimes involve the pulmonary arteries and visceral vessels. Despite efforts to create criteria for clinical...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:
更新日期:1995-11-01 00:00:00
abstract:OBJECTIVE:To evaluate the distal extent and attenuation of bowel opacification achieved after administration of a single low volume dose of oral contrast 2 hours before computed tomographic colonography (CTC) after incomplete optical colonoscopy. METHODS:This retrospective study included 144 patients undergoing CTC af...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,多中心研究
doi:10.1097/RCT.0b013e3181f5a610
更新日期:2011-01-01 00:00:00
abstract:OBJECTIVE:Our goal was to evaluate the role of Gd-enhanced MR in the diagnosis and surgical planning of intraventricular cysticercosis cysts. MATERIALS AND METHODS:Thirty-three patients with intraventricular cysticercosis were evaluated with Gd-enhanced MRI including follow-up studies ranging over time periods from 6 ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199311000-00015
更新日期:1993-11-01 00:00:00
abstract:PURPOSE:Our goal was to verify the correlation between the arterioportal shunt caused by liver biopsy injury and wedge-shaped early transient subsegmental parenchymal enhancement (TSPE) of the liver during helical dynamic CT. METHOD:Twenty-one consecutive patients with suspected hepatic tumor underwent percutaneous ne...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199705000-00004
更新日期:1997-05-01 00:00:00
abstract:OBJECTIVE:To verify the earliest detectability of liver metastases in patients who underwent serial multidetector computed tomography (MDCT) examinations. METHODS:We selected 12 patients with known primary cancer who underwent 4 or more contrast-enhanced, 4-detector MDCTs. When metastases had been reported, an evaluat...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-200605000-00006
更新日期:2006-05-01 00:00:00
abstract:PURPOSE:Our goal was to characterize the MR features of pathologically documented gliosarcoma and to determine if these features help differentiate gliosarcoma from other intracranial neoplasms. METHOD:MR studies of six patients with pathologically documented gliosarcoma were retrospectively analyzed. RESULTS:The tum...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199609000-00006
更新日期:1996-09-01 00:00:00
abstract::We present a case of a child with acute bacterial leptomeningeal infection caused by Streptococcus pneumoniae. There was an extension of infection along multiple Virchow-Robin spaces into the brain parenchyma, resulting in multiple microabscesses. These abscesses showed restricted diffusion on the diffusion-weighted i...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/RCT.0b013e318187ff15
更新日期:2009-07-01 00:00:00
abstract:OBJECTIVE:The goal of this study was to quantify changes in uterine volume during and after chemotherapy for breast cancer. MATERIALS AND METHODS:Fifty-eight patients (mean age 42 years) with advanced breast cancer undergoing treatment with FLAC (5-fluorouracil, leucovorin, Adriamycin, and cyclophosphamide) were studi...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199507000-00016
更新日期:1995-07-01 00:00:00
abstract::Complete duplication of the pituitary gland is an extremely rare condition which is associated with a wide range of anomalies. An incomplete duplication affecting only the anterior pituitary gland or the pituitary stalk has not been described so far. We report 2 such cases of partial duplication of the hypophysis and ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/01.rct.0000243458.08061.f1
更新日期:2007-05-01 00:00:00
abstract:OBJECTIVE:Our goal was to clarify the ability of CT to evaluate intramural invasion of gastric cancer. MATERIALS AND METHODS:We reviewed bolus-enhanced CT images performed with orally administered 400-600 ml of water in 59 early gastric cancers and 22 advanced gastric cancers mimicking early gastric cancers macroscopi...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199511000-00019
更新日期:1995-11-01 00:00:00
abstract::Hereditary osteo-onychodysplasia, also known as the nail-patella syndrome (NPS), consists of a clinical tetrad of nail dysplasia, hypoplastic or absent patella, radial head dislocation, and iliac horns. Bilateral posterior iliac horns are observed only in NPS and present in >80% of patients. We describe the appearance...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199607000-00005
更新日期:1996-07-01 00:00:00
abstract::Two cases demonstrating the computed tomographic appearance of azygos continuation of the inferior vena cava (IVC) are presented. One is associated with a retroaortic left renal vein and the other with a duplicated IVC. An enlarged azygos vein should not be confused with retrocrural lymphadenopathy or a mediastinal ma...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198006000-00015
更新日期:1980-06-01 00:00:00
abstract::Uterine cirsoid aneurysm is uncommon. It is important to make a diagnosis of this disease preoperatively, because repeated curettages may induce life-threatening massive genital bleeding. We present a case of a 51-year-old woman with uterine cirsoid aneurysm in whom MRI and MRA were very useful for the preoperative di...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199603000-00023
更新日期:1996-03-01 00:00:00
abstract::Proton MR spectroscopy of the brain has been undertaken in 8 healthy volunteers and in 11 patients with human immunodeficiency virus infection and varying stages of AIDS dementia complex (ADC). Spectral appearances in patients with no ADC or early ADC were not significantly different from normal volunteers. Spectra fr...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199207000-00007
更新日期:1992-07-01 00:00:00
abstract::Coronary artery disease is currently the largest killer in the western world, and is estimated to become the leading cause of death worldwide by the year 2020. The question therefore is whether magnetic resonance imaging currently has a place in the already extremely well equipped armamentarium of cardiac testing. Alt...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,评审
doi:10.1097/00004728-199911001-00019
更新日期:1999-11-01 00:00:00
abstract::Despite increasing performance of pituitary imaging, adrenocorticotropic hormone (ACTH)-secreting pituitary adenomas are often difficult to identify because of their small size and variable location. We present a case of ACTH-dependent Cushing syndrome in which the demonstration of the cavernous sinus localization of ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章,评审
doi:10.1097/00004728-200305000-00021
更新日期:2003-05-01 00:00:00
abstract:OBJECTIVE:This article focuses on an unusual cross-sectional imaging pattern of a deep developmental venous anomaly (DVA). Since these anomalies are nonpathologic, they must not be interpreted as a disease that requires further costly workup and potentially injurious procedures (cerebral angiography). MATERIALS AND ME...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199511000-00008
更新日期:1995-11-01 00:00:00
abstract::Two cases of necrotizing herpes simplex encephalitis (HSE) were investigated with 99mTc-hexamethylpropyleneamineoxime (HMPAO) SPECT and MR. The clinical course was compared with the neuroimaging results. In the acute stage, the increased HMPAO uptake matched the MR hyperintense signal in the limbic temporal lobe and i...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199109000-00016
更新日期:1991-09-01 00:00:00
abstract::The computed tomographic demonstration of a glomus jugulare tumor with two unusual radiographic features--multiple pulmonary metastases and extension of the tumor into the cerebellopontine angle--is presented. ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198006000-00022
更新日期:1980-06-01 00:00:00
abstract::Ten children, ranging in age from 3 weeks to 11 years, with a history of primary cardiac tumors were studied by two-dimensional echocardiography and by ECG triggered magnetic resonance (MR) imaging (six of them had rhabdomyomas). Eighteen of 31 tumors with intracavitary extension diagnosed by echocardiography were det...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198907000-00012
更新日期:1989-07-01 00:00:00
abstract::A recent case of absence of a cervical pedicle in a traumatized patient is presented. An incorrect radiological interpretation of the patient's plain films resulted in inappropriate management. Further radiological investigation, including computed tomography, revealed the underlying abnormality, and prevented subsequ...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-198406000-00033
更新日期:1984-06-01 00:00:00
abstract:PURPOSE:High resolution MR images obtained from a normal human volunteer at 8 T are utilized to describe the appearance of iron-containing deep gray nuclei at this field strength. METHOD:High resolution (1,024 x 1,024 matrix) near-axial gradient echo images of the deep gray nuclei were acquired on a human volunteer by...
journal_title:Journal of computer assisted tomography
pub_type: 杂志文章
doi:10.1097/00004728-199911000-00009
更新日期:1999-11-01 00:00:00