Abstract:
OBJECTIVE:The purpose of study was to develop a computer-simulated liver phantom for hepatic CT studies. A computer-simulated liver phantom was mathematically constructed on a computer workstation. MATERIALS AND METHODS:The computer-simulated phantom was calibrated using real CT images acquired by an actual four-detector CT. We added an inhomogeneous texture to the simulated liver by referring to CT images of chronically damaged human livers. The mean CT number of the simulated liver was 60 HU and we added numerous 5-to 10-mm structures with 60+/-10 HU/mm. To mimic liver tumors we added nodules measuring 8, 10, and 12 mm in diameter with CT numbers of 60+/-10, 60+/-15, and 60+/-20 HU. Five radiologists visually evaluated similarity of the texture of the computer-simulated liver phantom and a real human liver to confirm the appropriateness of the virtual liver images using a five-point scale. RESULTS:The total score was 44 in two radiologists, and 42, 41, and 39 in one radiologist each. They evaluated that the textures of virtual liver were comparable to those of human liver. CONCLUSIONS:Our computer-simulated liver phantom is a promising tool for the evaluation of the image quality and diagnostic performance of hepatic CT imaging.
journal_name
Eur Radioljournal_title
European radiologyauthors
Funama Y,Awai K,Miyazaki O,Nakayama Y,Liu D,Goto T,Yamashita Y,Hori Sdoi
10.1007/s00330-005-0012-5subject
Has Abstractpub_date
2006-04-01 00:00:00pages
837-45issue
4eissn
0938-7994issn
1432-1084journal_volume
16pub_type
杂志文章abstract:OBJECTIVES:To evaluate complex CSF movements and shear stress in patients with idiopathic normal pressure hydrocephalus (iNPH) on four-dimensional (4D) flow MRI. METHODS:Three-dimensional velocities and volumes of the reciprocating CSF movements through 12 ROIs from the foramen of Monro to the upper cervical spine wer...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-020-06825-6
更新日期:2020-08-01 00:00:00
abstract:OBJECTIVES:To evaluate the positive predictive values (PPVs) of calcifications with suspicious morphology by incorporating distribution and clinical factors in two separate cohorts to provide more practical guidance for management. METHODS:This retrospective study included 1076 consecutive women from two cohorts (coho...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-020-07215-8
更新日期:2020-09-22 00:00:00
abstract::This report describes a malpractice case involving a delayed diagnosis of a malignant bone tumour in the proximal tibia in a 10-year-old child. This was caused by a combination of factors. The final report on the first examination failed to reach the patient files, and two subsequent X-ray exams failed to diagnose the...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s003300051021
更新日期:2000-01-01 00:00:00
abstract::Typical MRI findings for gastro-intestinal stromal tumours (GIST) under treatment with imatinib were evaluated. MRI was performed in 45 patients (25 responders, 20 non-responders) with metastatic or locally advanced, unresectable GIST. Target lesions were selected and re-evaluated after 2, 4, and 6 months of therapy w...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-005-2867-x
更新日期:2005-12-01 00:00:00
abstract::Our objective was to evaluate the hemolytic effect of stents and stent grafts in an in vitro flow model. The model consisted of silicone tubings. Pulsatile flow was delivered at 1170 ml/min. Diluted packed erythrocytes were used (hematocrit of 33%). The Palmaz, MegaLink stents or Passager, Hemobahn stent grafts were p...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-002-1664-z
更新日期:2003-06-01 00:00:00
abstract:OBJECTIVES:To apply an easy-to-assemble phantom substitute for human prostates in T2-weighted magnetic resonance imaging (T2WI), diffusion-weighted imaging (DWI) and 3D magnetic resonance spectroscopy (MRS). METHODS:Kiwi fruit were fixed with gel hot and cold compress packs on two plastic nursery pots, separated by a ...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-016-4706-7
更新日期:2017-08-01 00:00:00
abstract:OBJECTIVES:To evaluate the quantitative parameters obtained from dynamic MR T2*-weighted images as predictors of survival taking into consideration the biasing effects of other survival-related covariates. METHODS:Thirty-nine patients (60 ± 14 years; survival 267 ± 191 days) with high-grade gliomas (8 grade III, 31 gr...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-013-2967-y
更新日期:2013-12-01 00:00:00
abstract:OBJECTIVE:To compare the diagnostic performance of full-field digital mammography (FFDM) with screen-film mammography (SFM) in a corporate screening programme including younger women. METHODS:Data were available on 14,946 screening episodes, 5010 FFDM and 9936 SFM. Formal analysis was by logistic regression, adjusting...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-010-1968-3
更新日期:2011-04-01 00:00:00
abstract::Bilioma is a rare complication of traumatic liver injury, and the precise site of bile leak is often difficult to demonstrate with a non-invasive technique. We report a case of post-traumatic bile leak in a 15-year-old girl in whom spiral CT after intravenous cholangiography allowed excellent preoperative demonstratio...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s003300050637
更新日期:1999-01-01 00:00:00
abstract:OBJECTIVE:The purpose of this study is to describe a new method to quickly estimate left atrial enlargement (LAE) on Computed Tomography. METHODS:Left atrial (LA) volume was assessed with a 3D-threshold Hounsfield unit detection technique, including left atrial appendage and excluding pulmonary venous confluence, in 2...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-017-5041-3
更新日期:2018-03-01 00:00:00
abstract::Our objective was to determine the value of the Ottawa knee rules when applied by users with different levels of clinical training. We used a prospective patient survey by the medical students and surgery residents of a European university trauma centre. The study group consisted of 261 eligible patients who presented...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-001-1198-9
更新日期:2002-05-01 00:00:00
abstract:OBJECTIVES:To evaluate Estimated Glomerular Filtration Rate (eGFR), using the Modification of Diet in Renal Disease equation, and compare with radionuclide GFR (rGFR) in a Radiology setting to assess renal function prior to contrast administration. METHODS:Five hundred and sixteen retrospective rGFR studies from a mix...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-011-2157-8
更新日期:2011-10-01 00:00:00
abstract:OBJECTIVES:To retrospectively determine incidence of early arterial blood flow stasis and its influencing factors during resin-based radioembolization (RE) of liver tumours. METHODS:Data of patients undergoing resin-based RE from 06/2006-12/2013 were reviewed. Second RE procedures of the same liver lobe were excluded....
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-015-4076-6
更新日期:2016-08-01 00:00:00
abstract::Our purpose was to assess the role of MRI in evaluating the musculoskeletal system in athletes with chronic pain laterally in the groin of unknown etiology. Magnetic resonance imaging (MRI) of the pubic ring was performed in 11 young athletes (soccer players) with long-standing groin pain. MR findings were compared wi...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/BF00619952
更新日期:1996-01-01 00:00:00
abstract::The original version of this article, published on 07 January 2019, unfortunately contained a mistake. ...
journal_title:European radiology
pub_type: 已发布勘误
doi:10.1007/s00330-019-06044-8
更新日期:2019-06-01 00:00:00
abstract:OBJECTIVE:To assess the heterogeneity of liver fat deposition with MR of the liver in type-2 diabetic (T2D) patients. METHODS:We enrolled 121 consecutive T2D patients. The reference standard was 3.0-T (1)H-MR spectroscopy. Hepatic steatosis was defined as liver fat content (LFC) ≥5.56 %. A triple-echo gradient-echo se...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-012-2468-4
更新日期:2012-10-01 00:00:00
abstract::A 6-year-old girl with a symptomatic renal cyst underwent successful percutaneous aspiration and sclerotherapy with hypertonic saline under US guidance. Although membrane detachment sign was seen clearly during aspiration, it was confirmed to be a simple cyst. In contrast to previous reports, membrane detachment sign ...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/BF00240694
更新日期:1996-01-01 00:00:00
abstract::Our objective was to study Gd-EOB-DTPA for the characterization of focal liver lesions by means of dynamic MR imaging. A double-blind and randomized dose-ranging phase-2 clinical trial was performed in 31 patients (liver metastases n = 23, hepatocellular carcinoma n = 4, and hemangioma n = 4) at a field strength of 1....
journal_title:European radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1007/s003300050150
更新日期:1997-01-01 00:00:00
abstract:OBJECTIVES:To study the effect of patient size, body region and modulation strength on tube current and image quality on CT examinations that use automatic tube current modulation (ATCM). METHODS:Ten physical anthropomorphic phantoms that simulate an individual as neonate, 1-, 5-, 10-year-old and adult at various body...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-014-3309-4
更新日期:2014-10-01 00:00:00
abstract::The aim of this study was to assess whether magnetic resonance imaging could predict the outcome of attempted vaginal delivery in a group of pregnant women whose parturition had to be induced by oxytocin. The signal intensity and morphology alterations in the cervix of 21 full-term pregnant women were analyzed before ...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s003300051001
更新日期:2000-01-01 00:00:00
abstract:OBJECTIVES:To evaluate the diagnostic accuracy of dual-energy computed tomography (DECT) in identifying bone marrow edema (BME) around the hip joint in non-traumatic patients. METHODS:This prospective IRB-approved study was conducted between January 2019 and October 2019 and included 59 consecutive patients (18 males,...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-020-06775-z
更新日期:2020-07-01 00:00:00
abstract:AIMS AND OBJECTIVES:Deep venous thrombosis (DVT) can be difficult to detect using CT due to poor and heterogeneous contrast. Dual-energy CT (DECT) allows iodine contrast optimization using noise-optimized monoenergetic extrapolations (MEIs) and iodine maps (IMs). Our aim was to assess whether MEI and IM could improve t...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-014-3544-8
更新日期:2015-06-01 00:00:00
abstract:OBJECTIVE:To investigate the prevalence and diagnostic value of first-pass myocardial perfusion defects (PD) visualised by contrast-enhanced multidetector computed tomography (MDCT) in patients admitted for a first acute coronary syndrome (ACS). METHODS:Thirty-eight patients with non-ST segment elevation myocardial in...
journal_title:European radiology
pub_type: 临床试验,杂志文章
doi:10.1007/s00330-010-1725-7
更新日期:2010-07-01 00:00:00
abstract::The increasing availability of high-field (3 T) MR scanners requires adapting and optimizing clinical imaging protocols to exploit the theoretically higher signal-to-noise ratio (SNR) of the higher field strength. Our aim was to establish reliable and stable protocols meeting the clinical demands for imaging the neuro...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-003-1984-7
更新日期:2003-09-01 00:00:00
abstract::With the advent of powerful gradient coil systems and high-resolution surface coils, magnetic resonance imaging (MRI) has recently extended its role in the staging of rectal cancer. MRI is superior to endorectal ultrasound, the most widely used staging modality in patients with rectal tumors, in that it visualizes not...
journal_title:European radiology
pub_type: 杂志文章,评审
doi:10.1007/s00330-006-0388-x
更新日期:2007-02-01 00:00:00
abstract::To quantify permeability changes of the "blood-bone marrow barrier" (BMB) and to detect malignant bone marrow infiltrations before and after conditioning therapy for subsequent leukapheresis using ferumoxtran-10-enhanced magnetic resonance (MR) imaging. Twenty-two patients with malignant non-Hodgkin lymphomas (NHL), i...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-005-0045-9
更新日期:2006-03-01 00:00:00
abstract::The aim of this study was to evaluate the efficiency of the fetal iliac wing angle measurements in the detection of trisomy 21 during the second trimester and the impact of the fetal position on this measurement. During a 43-month period, the iliac wing angle was prospectively measured in 695 fetuses at genetic ultras...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-003-1896-6
更新日期:2003-09-01 00:00:00
abstract::Three europium-activated phosphors Y2O2S:Eu, Y2O3:Eu, and YVO4:Eu emitting red light were studied to investigate their suitability for radiographic cassettes or digital imaging systems. Screens were prepared from phosphor powders with various coating thicknesses by sedimentation. To assess phosphor light producing eff...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s003300050387
更新日期:1998-01-01 00:00:00
abstract::We performed a bibliometric search to evaluate number and scientific "weight" of papers written by European radiologists, as compared with colleagues from other countries, to measure the contribution of European researchers to radiology journals, and to correlate bibliometric parameters with some socio-economic factor...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-002-1640-7
更新日期:2003-04-01 00:00:00
abstract::The aim of this study was to evaluate inter- and intra-observer reproducibility when making electronic caliper linear tumor measurements on picture archiving and communications systems (PACS) and compare them with linear measurements obtained from circumferential tracing of tumor perimeter. Three radiologists measured...
journal_title:European radiology
pub_type: 杂志文章
doi:10.1007/s00330-003-2027-0
更新日期:2004-03-01 00:00:00