Abstract:
OBJECTIVE:We examined the detectability of small hepatocellular carcinomas (HCCs) and the factors that affect hyperintensity of small HCC on T1-weighted images (T1W) by using T1-weighted fat-suppressed images (T1FS). METHODS:Thirty-nine HCCs (29 patients) measuring 30 mm or less were enrolled. The mean size of HCCs was 21.0+/-4.9 mm. Spin-echo T1W, T2-weighted images (T2W), and T1FS were obtained using a 1.5 T system. We evaluated the detectability in each sequence by receiver-operating-characteristic (ROC) analysis and the tumor-to-hepatic parenchyma contrast-to-noise ratio (CNR), the variance in the detectability among all interpreters with each sequence, and the presence or absence of improvement in the detectability by interpreting T1FS in addition to conventional T1W plus T2W. The contents of fat, copper, and iron in histologically diagnosed HCCs showing hyperintensity on both T1W and T1FS were measured. For determination of heavy metals, we used a particle induced X-ray emission analytical instrument. RESULTS:ROC analyses revealed that T1FS were superior to T1W and T2W in detecting small HCCs (0.900+/-0.017 for T1FS, 0.859+/-0.019 for T1W, and 0.745+/-0.030 for T2W). The detectability by interpreting T1FS in addition to conventional T1W plus T2W was improved (0.931+/-0.013 for the conventional images and 0.973+/-0.008 for the conventional images plus T1FS, P<0.001). The detected lesions on T1FS demonstrated favorable CNR values. The copper content in the cancer and the ratio of the copper content in the cancer to that in the non-cancerous tissue were 275.4+/-219.0 microg/g dry weight, 6.9+/-5.5 in HCCs showing hyperintensity on both T1W and T1FS. Both were significantly higher (P<0.05). CONCLUSION:T1FS showed excellent sensitivity and specificity in detecting small HCCS irrespective of the experience of interpreters. The use of T1FS suggested the involvement of copper might be one of the factors in hyperintensity of HCCs on T1W.
journal_name
Eur J Radioljournal_title
European journal of radiologyauthors
Koushima Y,Ebara M,Fukuda H,Morimoto N,Sugiura N,Yoshikawa M,Sanada M,Saisho H,Matsumoto T,Yukawa Mdoi
10.1016/s0720-048x(01)00346-1keywords:
subject
Has Abstractpub_date
2002-01-01 00:00:00pages
34-41issue
1eissn
0720-048Xissn
1872-7727pii
S0720048X01003461journal_volume
41pub_type
杂志文章abstract:PURPOSE:To evaluate the influence of radiation dose settings and reconstruction algorithms on the measurement accuracy and reproducibility of semi-automated pulmonary nodule volumetry. MATERIALS AND METHODS:CT scans were performed on a chest phantom containing various nodules (10 and 12mm; +100, -630 and -800HU) at 12...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2014.01.025
更新日期:2014-05-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Although isotropic diffusion-weighted imaging (isoDWI) is very sensitive to the detection of acute ischemic stroke, it may occasionally show diffusion negative result in hyper-acute stroke. We hypothesize that high diffusion contrast diffusion trace-weighted image with enhanced T2 may improve str...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2009.04.023
更新日期:2010-06-01 00:00:00
abstract:PURPOSE:The purpose of this cadaver study was to determine the ideal position of the wrist for scaphoid radiography. MATERIALS AND METHODS:Four cadaver wrists were rotated around their longitudinal axis in 15 degrees increments and exposures were taken. Seven postero-anterior images were taken as well. Thus, 18 images...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2007.02.008
更新日期:2007-10-01 00:00:00
abstract:PURPOSE:Within five years after presentation 50-60% of patients with chronic limb-threatening ischemia (CLI) have died or had an amputation. We assessed the predictive value of lower extremity arterial calcification on computed tomography (CT) characteristics on both 7-years amputation-free survival and 10-years all-ca...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2020.109305
更新日期:2020-11-01 00:00:00
abstract:OBJECTIVE:To test the hypothesis that the development of corticosteroid (CS)-associated femoral head osteonecrosis (ON) is influenced by baseline femoral neck marrow status. PATIENTS AND METHODS:The population consisted of 20 untreated patients with a newly diagnosed rheumatic disease in whom a standardized CS regimen...
journal_title:European journal of radiology
pub_type: 临床试验,杂志文章
doi:10.1016/j.ejrad.2006.01.009
更新日期:2006-06-01 00:00:00
abstract:PURPOSE:To compare low- and high-attenuation oral contrast media for depiction of normal gastrointestinal anatomy with multidetector-row computed tomography (MDCT). MATERIALS AND METHODS:A prospective, randomized study of 90 consecutive patients without known or suspected gastrointestinal disease was conducted after t...
journal_title:European journal of radiology
pub_type: 杂志文章,随机对照试验
doi:10.1016/j.ejrad.2007.05.015
更新日期:2008-04-01 00:00:00
abstract::In order to adequately visualize the ossicles and other fine structures in the middle ear, sophisticated radiological methods are essential. The temporal bone has been studied with hypocycloidal tomography using conventional films and xerotomography in 60 patients with cholesteatoma. In 53 of the patients xerotomograp...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:
更新日期:1982-05-01 00:00:00
abstract:PURPOSE:The aim of this study was to evaluate reproducibility of a fast MRI protocol to measure gastric emptying and motility of the gastric antrum. METHODS AND MATERIALS:Gastric emptying and antral speed were measured in 12 type 1 diabetic patients (mean age 43 years) and 9 healthy volunteers (mean age 31 years). Sub...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2009.04.071
更新日期:2010-08-01 00:00:00
abstract::In this overview the results and indications of Magnetic Resonance Angiography of the intracranial vasculature will be discussed. The value of MRA will be studied in the visualisation of normal variants of the cerebral anatomy, the imaging of cerebrovascular disease, the diagnosis of aneurysms and cerebral arterioveno...
journal_title:European journal of radiology
pub_type: 杂志文章,评审
doi:10.1016/s0720-048x(01)00285-6
更新日期:2001-04-01 00:00:00
abstract::The aim of this prospective study was to assess the accuracy of modern ultrasonography in diagnostic imaging of meniscal tears. One hundred and sixty menisci were evaluated in 80 patients (42 females, 38 males, mean age=36.2 years, range=16-70 years). Inclusion criteria for the study were twofold: clinical suspicion o...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2011.09.013
更新日期:2012-09-01 00:00:00
abstract:PURPOSE:To evaluate the additional value of the color coding of dynamic data using the 3TP method in the evaluation of contrast-enhanced breast MRI for readers with different levels of experience. MATERIALS AND METHODS:A total of 52 lesions were included in this study, 25 malignant and 27 benign. All lesions were eval...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2009.03.053
更新日期:2010-06-01 00:00:00
abstract:OBJECTIVE:To study whether calcifications in breast arteries, as seen on mammograms, predict future development of coronary artery calcifications. METHODS:We studied 499 women, aged 49-70 years, participating in a breast cancer screening program and investigated whether arterial calcifications in the breast (BAC) are ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2007.02.009
更新日期:2007-09-01 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::Solitary osteosclerotic bone lesions around the sacroiliac (SI) joints are described as seen on plain radiographs or conventional tomography, with the descriptive attributes ranging from round to ovoid over square and triangular to multiform. The etiology of the solitary osteosclerotic lesions around the SI joint can ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/s0720-048x(97)00175-7
更新日期:1998-07-01 00:00:00
abstract::Skeletal traumas are among the most common routine challenges faced by Emergency Radiologists, in particular in case of radiographically occult nondisplaced fractures or in case of soft tissue injuries. With the development of Dual Energy Computed Tomography (DECT) technology, new post-processing applications have gai...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2020.109456
更新日期:2021-01-01 00:00:00
abstract:PURPOSE:To evaluate the diagnostic performance of coronary computed tomography angiography derived fractional flow reserve (CT-FFR) with invasive fractional flow reserve (FFR) in patients with coronary artery disease" before "with invasive fractional flow reserve serving as the reference standard. MATERIALS AND METHOD...
journal_title:European journal of radiology
pub_type: 杂志文章,meta分析,多中心研究
doi:10.1016/j.ejrad.2019.04.011
更新日期:2019-07-01 00:00:00
abstract:PURPOSE:To perform a systematic review and meta-analysis evaluating usefulness of high-risk CT features (HRFs) on follow-up CT in detecting local recurrence after stereotactic body radiation therapy (SBRT) in lung cancer patients. METHODS:Pubmed and EMBASE were searched up to January 11th, 2019. We included studies th...
journal_title:European journal of radiology
pub_type: 杂志文章,meta分析
doi:10.1016/j.ejrad.2020.108978
更新日期:2020-06-01 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:PURPOSE:To evaluate the value of a vessel removal algorithm in segmentation of subsolid nodules by comparing the software solid component measurement on CT, before and after vessel removal, with the measurement of the invasive component on pathology in lung adenocarcinomas manifesting as subsolid nodules. MATERIALS AN...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2018.01.016
更新日期:2018-03-01 00:00:00
abstract::Nephrogenic systemic fibrosis (NSF) is a debilitating disorder seen in-patient with advanced chronic kidney disease (CKD). Recent evidence suggests a link between NSF and the administration of gadolinium-based contrast agents (Gd-CA). In addition, other risk factors have also been suggested to facilitate the developme...
journal_title:European journal of radiology
pub_type: 杂志文章,评审
doi:10.1016/j.ejrad.2008.01.028
更新日期:2008-05-01 00:00:00
abstract:OBJECTIVES:To examine the efficacy of qualitative shear wave elastography (SWE) in the classification and evaluation of solid breast masses, and to compare this method with conventional ultrasonograghy (US), quantitative SWE parameters and qualitative SWE classification proposed before. METHODS:From April 2015 to Marc...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2016.12.021
更新日期:2017-02-01 00:00:00
abstract::The assessment of pulmonary function, including ventilation and perfusion status, is important in addition to the evaluation of structural changes of the lung parenchyma in various pulmonary diseases. The dual-energy computed tomography (DECT) technique can provide the pulmonary functional information and high resolut...
journal_title:European journal of radiology
pub_type: 杂志文章,评审
doi:10.1016/j.ejrad.2016.11.010
更新日期:2017-01-01 00:00:00
abstract:INTRODUCTION:Postoperative CSF leak is the most common complication of endoscopic endonasal approach (EEA) to skull base lesions. Endoscopic multilayer closure of skull base defect using pedicled nasoseptal flaps (NSF) based off the sphenopalatine artery reduces CSF leaks. EEA robustly expands in surgical arena, yet po...
journal_title:European journal of radiology
pub_type: 临床试验,杂志文章
doi:10.1016/j.ejrad.2012.09.029
更新日期:2013-03-01 00:00:00
abstract::Iodixanol is a new nonionic dimer, isotonic with blood at all concentrations. Iodixanol 320 mgI/ml was compared in a double-blind, randomized study to the ionic dimer ioxaglate 320 mgI/ml for evaluation of safety and efficacy parameters during cerebral arteriography. Eighty adult patients were enrolled and all complet...
journal_title:European journal of radiology
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1016/0720-048x(93)90105-v
更新日期:1993-11-01 00:00:00
abstract::The main of this work is to determine the elemental and absorption distribution map in breast tissue samples by X-ray fluorescence and X-ray transmission microtomography. The experiments were performed at the X-ray fluorescence beamline (D09B-XRF) in the Brazilian Synchrotron Light Source (LNLS), Campinas, Brazil. A q...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2008.04.047
更新日期:2008-12-01 00:00:00
abstract:OBJECTIVE:To prospectively evaluate the diagnostic efficacy of conventional ultrasound (US), contrast-enhanced US (CEUS), the combined use of two modalities, and magnetic resonance imaging (MRI) in the differentiation of focal solid breast lesions. MATERIALS AND METHODS:61 patients with BI-RADS category 3-5 breast les...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2012.09.004
更新日期:2012-12-01 00:00:00
abstract:OBJECTIVE:To compare the high resolution CT (HRCT) scores of the Bhalla system with pulmonary function tests and radiographic and clinical points of the Shwachman-Kulczycki clinical scoring system. METHODS:HRCT of the chest was obtained in 40 children to assess the role of HRCT in evaluating bronchopulmonary pathology...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/s0720-048x(00)00236-9
更新日期:2001-01-01 00:00:00
abstract::The ability of PI measurements to differentiate between acute rejection and ATN was investigated in 37 patients, who were frequently examined by duplex Doppler after kidney transplant. Absolute PI values as well as increase in PI were recorded and the clinical course was correlated with these pulsatility measurements....
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/0720-048x(92)90057-g
更新日期:1992-01-01 00:00:00
abstract::Although tumors of the parapharyngeal space are rare, they represent a formidable diagnostic and treatment challenge. The differentiation of a retrostyloid lesion from a prestyloid lesion is critical for guiding the differential diagnosis. The majority of lesions involving the retrostyloid parapharyngeal space are eit...
journal_title:European journal of radiology
pub_type: 杂志文章,评审
doi:10.1016/j.ejrad.2013.01.005
更新日期:2013-05-01 00:00:00
abstract:PURPOSE:To assess the agreement between ablative margin (AM) predicted by preablation three-dimensional ultrasonography (3D-US) and AM measured on postablation computed tomography (CT)/magnetic resonance (MR) images. METHODS:Sixty patients with 73 hepatocellular carcinoma nodules were enrolled. 3D-US data were collect...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2020.109358
更新日期:2020-12-01 00:00:00