Abstract:
RATIONALE AND OBJECTIVES:To determine whether an unenhanced low-dose image acquired during automated contrast bolus timing can be used to assess hepatic steatosis. MATERIALS AND METHODS:Fifty subjects (29 male, 21 female; 26-92 years; mean body mass index (BMI; 26.9) with abdominal multiphasic computed tomography were included. Abdominal diameters and circumferences were derived from anteroposterior and lateral scout radiographs. Hepatic attenuation (HA) was measured on unenhanced low-dose images (120 kV; 40 mA; 0.5 seconds' rotation time) and corresponding unenhanced standard-dose images (120 kV, z-axis automatic tube current modulation, noise index 11.5). Noise estimates were measured in surrounding air. Pearson correlation was calculated between abdominal circumference and BMI. Mean HA assessed on low-dose images and standard-dose images was compared using a paired Student's t-test and Bland Altman plots. RESULTS:Abdominal circumference (mean, 142.8cm) correlated well with BMI (r = 0.83). No significant difference was found for HA on low-dose images (mean +57.7 HU) compared to HA on standard-dose images (+56.0 HU) (P = .077). Image noise (+11.5 HU) was significantly higher on low-dose images compared to image noise (+8.1 HU) on standard-dose images (P < .05). For HA mean difference comparing low- and standard-dose images was -1.7 HU (limits of agreement: -14.6, 11.2). CONCLUSION:In all subjects, hepatic attenuation can be correctly assessed on unenhanced low-dose images.
journal_name
Acad Radioljournal_title
Academic radiologyauthors
Husarik DB,Boll DT,Nelson RC,Merkle EMdoi
10.1016/j.acra.2011.02.013subject
Has Abstractpub_date
2011-07-01 00:00:00pages
822-7issue
7eissn
1076-6332issn
1878-4046pii
S1076-6332(11)00151-6journal_volume
18pub_type
杂志文章abstract:RATIONALE AND OBJECTIVES:Contrast agents have been shown to produce vasodilatory responses in several vascular beds. To our knowledge, however, their effect on the bronchial vasculature has not been examined. Clinically, contrast-induced bronchial vasodilation could potentially exacerbate life-threatening pulmonary hem...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(05)80700-7
更新日期:1995-11-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:With the introduction of new communication channels, such as encrypted messaging and online electronic medical record patient portals, there are ever-increasing ways for patients and their families to access their medical information. While patient preferences regarding how they receive the res...
journal_title:Academic radiology
pub_type: 杂志文章
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abstract:RATIONALE AND OBJECTIVES:To assess the usefulness of classifying degree of difficulty in abnormality detection and to determine the effect of knowing the true diagnosis when selecting subtle images for observer-performance studies. MATERIALS AND METHODS:A total of 529 posteroanterior chest images that had been used in...
journal_title:Academic radiology
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doi:10.1016/s1076-6332(98)80127-x
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abstract:RATIONALE AND OBJECTIVES:The purpose of this study was to compare the efficacy of dual-energy computed tomography (DECT), time-resolved magnetic resonance (MR) imaging (MRI) perfusion measurements, and high-resolution MR angiography (MRA) for the detection of pulmonary embolism (PE) in a rabbit model. MATERIALS AND ME...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2010.09.004
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abstract:BACKGROUND:To evaluate the utilization and efficacy of various treatments for management of adult patients with splenic trauma, highlighting the evolving role of splenic artery embolization. MATERIALS AND METHODS:The National Trauma Data Bank (NTDB) was queried for patients who sustained splenic trauma between 2007 an...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2020.11.010
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journal_title:Academic radiology
pub_type: 杂志文章
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更新日期:2003-08-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:We propose a novel segmentation-based interpolation method to reduce the metal artifacts caused by surgical aneurysm clips. MATERIALS AND METHODS:Our method consists of five steps: coarse image reconstruction, metallic object segmentation, forward-projection, projection interpolation, and fina...
journal_title:Academic radiology
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doi:10.1016/j.acra.2006.12.015
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abstract:RATIONALE AND OBJECTIVES:Scanning parameters used in multislice computed tomographic (MSCT) coronary angiography should be adapted to patients' heart rates. The aim of this study was to evaluate the rate of success of a software-assisted scan simulation to determine optimal gantry rotation time prior to MSCT coronary a...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2008.08.016
更新日期:2009-02-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
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更新日期:1999-09-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
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更新日期:2012-01-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2006.09.052
更新日期:2006-12-01 00:00:00
abstract:PURPOSE:To evaluate diagnostic accuracy and clinical outcomes of patients with porcelain gallbladder (GB) diagnosed on CT. MATERIALS AND METHODS:In this IRB-approved, HIPAA-compliant study, consecutive patients with porcelain gallbladder reported on CT between December 1, 2000 and August 31, 2017 in a tertiary academi...
journal_title:Academic radiology
pub_type: 杂志文章
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更新日期:2020-08-04 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
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更新日期:2016-09-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2017.08.012
更新日期:2018-01-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2014.01.016
更新日期:2014-07-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2008.09.015
更新日期:2009-03-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(05)80431-3
更新日期:1995-08-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/s1076-6332(00)80324-4
更新日期:2000-07-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
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更新日期:2007-09-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2020.08.021
更新日期:2020-09-21 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2017.03.024
更新日期:2017-09-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2019.04.023
更新日期:2020-03-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
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更新日期:1996-08-01 00:00:00
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journal_title:Academic radiology
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doi:10.1016/j.acra.2010.03.004
更新日期:2010-07-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2013.04.005
更新日期:2013-08-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2012.01.002
更新日期:2012-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:We have been called to reform radiology undergraduate medical education (UME) curricula. Clinically available clinical decision support provides an opportunity to improve education regarding appropriate imaging utilization, patient safety, and cost-effective care. MATERIAL AND METHODS:We creat...
journal_title:Academic radiology
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更新日期:2016-10-01 00:00:00
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journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2015.11.009
更新日期:2016-03-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:This study presents a method for generating breast masses and microcalcifications in mammography via simulation. This simulation method allows for the creation of large image datasets with particular lesions, which may serve as a useful tool for perception studies measuring imaging system perfo...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2006.03.015
更新日期:2006-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The aim of the study is to develop a theory-based signal calibration approach to be used for the conversion of signal-time curves to absolute contrast concentration-time curves for first-pass contrast-enhanced quantitative myocardial perfusion studies. MATERIALS AND METHODS:A normalization pro...
journal_title:Academic radiology
pub_type: 杂志文章
doi:10.1016/j.acra.2006.02.040
更新日期:2006-06-01 00:00:00