Abstract：
OBJECTIVE:to study various phosphors used in detectors of medical imaging systems by the gain transfer function (GTF), defined in terms of X-ray luminescence efficiency, light spectrum and modulation transfer function. MATERIALS AND METHODS:four phosphor materials, La(2)O(2)S:Tb, Y(2)O(2)S:Tb, Y(2)O(2)S:Eu and Y(2)O(3):Eu were used in the form of fluorescent layers prepared in the laboratory. The GTF was determined at 30 kVp and 80 kVp X-ray tube voltages for various phosphor coating weights. RESULTS:La(2)O(2)S:Tb, which was the highest density and effective atomic number phosphor used, was found to exhibit the best GTF performance at 80 kVp. At 30 kVp, the yttrium based phosphors were found of increased performance. This is mainly due to the proximity of the X-ray energy to the K-absorption edge of yttrium at 17 keV. Europium activated phosphors were found to perform very well when combined with the red sensitive film and the silicon photodiode. CONCLUSION:The GTF may be a useful method for comparing and selecting phosphor materials for use in various medical imaging applications.
journal_name
Eur J Radioljournal_title
European journal of radiologyauthors
Cavouras D,Kandarakis I,Maris T,Panayiotakis GS,Nomicos CDdoi
10.1016/s0720-048x(99)00106-0keywords:
subject
Has Abstractpub_date
2000-07-01 00:00:00pages
70-7issue
1eissn
0720-048Xissn
1872-7727pii
S0720-048X(99)00106-0journal_volume
35pub_type
杂志文章abstract：PURPOSE:Simple rating scale for calcification in the cervical arteries and the aortic arch on multi-detector computed tomography angiography (MDCTA) was evaluated its reliability and validity. Additionally, we investigated where is the most representative location for evaluating the calcification risk of carotid bifurc...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2013.10.011
更新日期：2014-02-01 00:00:00
abstract：PURPOSE:To compare projected breast area, image quality, pain experience and radiation dose between mammography performed with and without radiolucent positioning sheets. METHODS:184 women screened in the Dutch breast screening programme (May-June 2012) provided written informed consent to have one additional image ta...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2015.07.005
更新日期：2015-10-01 00:00:00
abstract：:The pulmonary radiological manifestations of lipoid pneumonia following a cultural practice of forced feeding of rendered animal fat (ghee) in 24 Saudi children are described. The age range is 15 days to 11 years with 68% of cases being in infancy. The chest radiographic appearances encountered could be grouped into f...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/0720-048x(93)90077-z
更新日期：1993-04-01 00:00:00
abstract：PURPOSE:To assess the diagnostic value of MRI using dual-echo (2PD) and triple-echo (3PD) chemical shift imaging for liver fat quantification against multi-echo T2 corrected MR spectroscopy (MRS) used as the reference standard, and examine the effect of T2(*) imaging on accuracy of MRI for fat quantification. MATERIAL...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2015.05.001
更新日期：2015-08-01 00:00:00
abstract：PURPOSE:The morbidity and mortality for pneumonectomy in patients has been reported to be as high as 24%. To determine if a subset of patients undergoing pneumonectomy for a malignancy would have similar complication rates and appearances, we performed a review of the radiographic findings of patients at our institutio...
journal_title：European journal of radiology
pub_type： 杂志文章,评审
doi：10.1016/j.ejrad.2010.08.040
更新日期：2012-01-01 00:00:00
abstract：OBJECTIVE:The aim of our study was to systematically compare different methodologies to establish an evidence-based approach based on tendon thickness and structure for sonographic diagnosis of supraspinatus tendinopathy when compared to MRI. METHODS:US was obtained from 164 symptomatic patients with supraspinatus ten...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2014.02.021
更新日期：2014-06-01 00:00:00
abstract：OBJECTIVES:To report our experience with transarterial glue embolization of the bronchial artery for life-threatening hemoptysis. MATERIALS AND METHODS:Twenty-five patients underwent bronchial artery embolization, using coaxial microcatheter technique, with a liquid agent, n-butyl-2-cyanoacrylate (NBCA), named glue, f...
journal_title：European journal of radiology
pub_type： 临床试验,杂志文章
doi：10.1016/j.ejrad.2008.10.017
更新日期：2010-02-01 00:00:00
abstract：:Patients with extended vascular anomalies may suffer from significant aesthetic and functional impairment and represent a challenge to therapeutic planning, which is best met by an interdisciplinary concept. In agreement with the International Society for the Study of Vascular Anomalies (ISSVA), vascular lesions are c...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2010.04.009
更新日期：2010-07-01 00:00:00
abstract：:Superparamagnetic iron oxide (SPIO) particles are as MR contrast media composed of iron oxide crystals coated with dextran or carboxydextran. These particles are sequestered by phagocytic Kupffer cells in normal reticuloendothelial system (RES), but are not retained in tumor tissue. Consequently, there are significant...
journal_title：European journal of radiology
pub_type： 杂志文章,评审
doi：10.1016/j.ejrad.2005.11.040
更新日期：2006-05-01 00:00:00
abstract：:Identification of abnormal bile related to various pathological processes in the pancreaticobiliary tract can be important in the diagnosis of disease and the determination of appropriate treatment. Magnetic resonance (MR) imaging can allow comprehensive evaluation of abnormal bile because MR usually provides better t...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2009.05.050
更新日期：2010-11-01 00:00:00
abstract：AIM:Comparison of the diagnostic value of cinefluoroscopy and simple fluoroscopy in the detection of calcification in coronary arteries. PATIENTS AND METHODS:Data were prospectively obtained from 143 patients in whom simple fluoroscopy as well as cinecoronary arteriography were performed. Excluded were patients with a...
journal_title：European journal of radiology
pub_type： 临床试验,杂志文章
doi：10.1016/0720-048x(94)00597-6
更新日期：1995-03-01 00:00:00
abstract：OBJECTIVES:Breast cancer is the second cause of death in women in Europe and North America. The mortality of this disease can be reduced with effective therapy and regular follow up to detect early recurrence. Tumor markers are sensitive in detecting recurrent or residual disease but imaging is required to customize th...
journal_title：European journal of radiology
pub_type： 杂志文章,多中心研究
doi：10.1016/j.ejrad.2010.04.029
更新日期：2011-12-01 00:00:00
abstract：PURPOSE:To examine the clinical significance of persistent renal enhancement after iodixanol administration. METHODS:We retrospectively studied 166 consecutive patients who underwent non-enhanced abdominopelvic CT within 7 days after receiving intra-arterial (n=99) or intravenous (n=67) iodixanol. Renal attenuation wa...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2011.02.044
更新日期：2011-11-01 00:00:00
abstract：OBJECTIVES:To retrospectively evaluate the detection performance of benign and malignant breast masses using 3D volume data obtained by ABUS and to determine lesion variables which affect detectability. METHODS:Between November and December of 2007, bilateral whole breast US images were obtained using ABUS in 67 conse...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2011.01.074
更新日期：2011-04-01 00:00:00
abstract：PURPOSE:Quantification of tumour burden in oncology requires accurate and reproducible image evaluation. The current standard is one-dimensional measurement (e.g. RECIST) with inherent disadvantages. Volumetric analysis is discussed as an alternative for therapy monitoring of lung and liver metastases. The aim of this ...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2010.10.019
更新日期：2011-12-01 00:00:00
abstract：PURPOSE:Cinematic rendering (CR), a recently launched, FDA-approved rendering technique converts CT image datasets into nearly photorealistic 3D reconstructions by using a unique lighting model. The purpose of this study was to compare CR to volume rendering technique (VRT) images in the preoperative visualization of m...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2020.108911
更新日期：2020-05-01 00:00:00
abstract：PURPOSE:The Prostate Imaging-Reporting and Data System has been developed to standardize prostate MRI in terms of acquisition, interpretation and reporting. It received a major revision in late 2014 (PI-RADSv2). Recently, doubts have been raised on imaging facilities adherence to its acquisition protocol. With this sys...
journal_title：European journal of radiology
pub_type： 杂志文章,meta分析
doi：10.1016/j.ejrad.2019.108662
更新日期：2019-11-01 00:00:00
abstract：PURPOSE:Groove pancreatitis is a rare focal form of chronic pancreatitis that occurs in the pancreaticoduodenal groove between the major and minor papillae, duodenum and pancreatic head. Radiologic appearance and clinical presentation can result in suspicion of malignancy rendering pancreaticoduodenectomy inevitable. T...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2014.05.019
更新日期：2014-08-01 00:00:00
abstract：:The impact of fast MR techniques developed for MR imaging of the lung will soon be recognized as equivalent to the high-resolution technique in chest CT imaging. In this article, the difficulties in MR imaging posed by lung morphology and its physiological motion are briefly introduced. Then, fast MR imaging technique...
journal_title：European journal of radiology
pub_type： 杂志文章,评审
doi：10.1016/s0720-048x(98)00174-0
更新日期：1999-02-01 00:00:00
abstract：OBJECTIVE:Standard stroke CT protocols start with non-enhanced CT followed by perfusion-CT (PCT) and end with CTA. We aimed to evaluate the influence of the sequence of PCT and CTA on quantitative perfusion parameters, venous contrast enhancement and examination time to save critical time in the therapeutic window in s...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2013.01.011
更新日期：2013-06-01 00:00:00
abstract：PURPOSE:Recent studies showed that dual energy CT (DECT) allows for detection of bone marrow infiltration in multiple myeloma (MM) by obtaining virtual non-calcium (VNCa) images. This feasibility study investigated, if VNCa imaging might discriminate metabolically active, focal lesions in MM against avital lesions in M...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2020.109502
更新日期：2021-02-01 00:00:00
abstract：PURPOSE:To assess if radiofrequency ablation (RFA) and transarterial chemoembolization (TACE) may influence the evaluation of perfusion parameters obtained with CT-perfusion (CT-p) in HCC treated patients. MATERIALS AND METHODS:Thirty-three consecutive cirrhotic patients with biopsy-proven diagnosis of HCC lesions and...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2014.05.040
更新日期：2014-09-01 00:00:00
abstract：OBJECTIVES:To calculate and compare the doses of ionizing radiation delivered to the organs by computed tomography (CT) and stereoradiography (SR) during measurements of lower limb torsion and anteversion. MATERIALS AND METHODS:A Rando anthropomorphic phantom (Alderson RANDO phantom, Alderson Research Laboratories Inc...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2013.10.026
更新日期：2014-02-01 00:00:00
abstract：:PACS has been widely adopted as an image storage solution that perfectly fits the radiology department workflow and that can be easily extended to other hospital departments. Integrations with other hospital systems, like the Radiology Information System, the Hospital Information System and the Electronic Patient Reco...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2010.05.026
更新日期：2011-05-01 00:00:00
abstract：OBJECTIVES:This study compared the MR measurement of minimum uninvolved cervical stroma and maximum stromal invasion, and the detection of positive lymph nodes with the pathological results. In addition, tumour type and grade were correlated with nodal status and apparent diffusion coefficient (ADC) values. METHODS:Pa...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2014.01.029
更新日期：2014-05-01 00:00:00
abstract：PURPOSE:To evaluate the diagnostic accuracy of a combination of dynamic contrast-enhanced MR imaging (DCE-MRI) and diffusion-weighted MR imaging (DWI) in characterization of lesions showing non-mass-like enhancement on breast MR imaging and to find the strongest discriminators between carcinoma and benignancy. MATERIA...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2009.09.013
更新日期：2010-07-01 00:00:00
abstract：PURPOSE:To evaluate the effect of rectal distension on the quality of anatomical and functional prostate multiparametric (mp) MRI. MATERIALS AND METHODS:Multiparametric (mp) 3T-MRI images of 173 patients were independently evaluated by two radiologists in this retrospective study. Planimetry rectal volumes were derive...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2017.02.029
更新日期：2017-05-01 00:00:00
abstract：OBJECTIVE:Using an anthropomorphic phantom, we have investigated the feasibility of digital tomosynthesis (DT) of flat-panel detector (FPD) radiography to reduce radiation dose for sinonasal examination compared to multi-detector computed tomography (MDCT). MATERIALS AND METHODS:A female Rando phantom was scanned cove...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2011.03.064
更新日期：2012-06-01 00:00:00
abstract：:Hepatic capsular retraction is a morphologic descriptor that refers to invagination or focal flattening of the typical smooth contour of the liver capsule. It is an uncommon finding that, when combined with other imaging features and clinical context, can help to refine the differential diagnosis in patients with live...
journal_title：European journal of radiology
pub_type： 杂志文章,评审
doi：10.1016/j.ejrad.2019.01.037
更新日期：2019-04-01 00:00:00
abstract：OBJECTIVES:We aimed to compare pain experienced during screening mammography, using three different compression paddles: a fixed paddle standardizing pressure (study paddle), a flexible, and a fixed paddle. MATERIAL AND METHODS:Using a numeric rating scale (NRS), ranged 0-10, we collected information on pain experienc...
journal_title：European journal of radiology
pub_type： 杂志文章
doi：10.1016/j.ejrad.2019.04.006
更新日期：2019-06-01 00:00:00
