Abstract：
:The aim was to propose a strategy for finding reasonable compromises between image noise and dose as a function of patient weight. Weighted CT dose index (CTDI(w)) was measured on a multidetector-row CT unit using CTDI test objects of 16, 24 and 32 cm in diameter at 80, 100, 120 and 140 kV. These test objects were then scanned in helical mode using a wide range of tube currents and voltages with a reconstructed slice thickness of 5 mm. For each set of acquisition parameter image noise was measured and the Rose model observer was used to test two strategies for proposing a reasonable compromise between dose and low-contrast detection performance: (1) the use of a unique noise level for all test object diameters, and (2) the use of a unique dose efficacy level defined as the noise reduction per unit dose. Published data were used to define four weight classes and an acquisition protocol was proposed for each class. The protocols have been applied in clinical routine for more than one year. CTDI(vol) values of 6.7, 9.4, 15.9 and 24.5 mGy were proposed for the following weight classes: 2.5-5, 5-15, 15-30 and 30-50 kg with image noise levels in the range of 10-15 HU. The proposed method allows patient dose and image noise to be controlled in such a way that dose reduction does not impair the detection of low-contrast lesions. The proposed values correspond to high- quality images and can be reduced if only high-contrast organs are assessed.
journal_name
Eur Radioljournal_title
European radiologyauthors
Verdun FR,Lepori D,Monnin P,Valley JF,Schnyder P,Gudinchet Fdoi
10.1007/s00330-003-2206-zsubject
Has Abstractpub_date
2004-05-01 00:00:00pages
835-41issue
5eissn
0938-7994issn
1432-1084journal_volume
14pub_type
杂志文章abstract：:Diffusion MRI has mainly been used for detection of acute ischemia, and for distinction of cytotoxic and vasogenic edema. We applied diffusion MRI in patients with tuberous sclerosis in order to evaluate diffusion imaging characteristics of parenchymal changes. Five children with known tuberous sclerosis were included...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s003300101029
更新日期：2002-01-01 00:00:00
abstract：INTRODUCTION:Safe practice and safety culture are important issues in outpatient diagnostic imaging services. As questionnaires assessing safety culture through the measurement of safety climate in this setting are not yet available, the present study aimed to develop and validate such an instrument. MATERIALS AND MET...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-018-5646-1
更新日期：2019-03-01 00:00:00
abstract：:Epiploic appendicitis and segmental omentum infarction are considered to be rare conditions, which may mimic an abdominal surgical emergency. The purpose of our study was to describe clinical findings, US and CT appearance of infarction of an epiploic appendage and omentum, and to determine their epidemiological chara...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s003300050942
更新日期：1999-01-01 00:00:00
abstract：OBJECTIVES:Cardiac magnetic resonance imaging (CMR) has proven itself as an accurate and robust diagnostic approach and has been widely used in the detection of various heart diseases. An increasing number of studies focusing more on the prognostic aspect of LGE-CMR arose in recent years, contributing to the redundant ...
journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s00330-020-07437-w
更新日期：2021-01-07 00:00:00
abstract：:The purpose of this study was to explain radiographic features of giant cell tumors of the tendon sheath (GCTTS), in particular, osseous extension, by correlating imaging findings with histology in order to increase the accuracy of radiological diagnosis. In a series of 200 consecutive osseous (pseudo) tumors of the h...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-006-0320-4
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：:We report the case of a 1.5-year-old girl with transient protein-losing gastropathy with hypertrophic gastric folds (PLGH). The diagnosis of PLGH was made by abdominal ultrasound (US) and not by an upper gastrointestinal (UGI) study as reported in many previous publications. Real-time compound ultrasound imaging showe...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-003-2071-9
更新日期：2003-12-01 00:00:00
abstract：:The purpose of this study was to evaluate the achievable organ dose savings in low-dose multislice computed tomography (MSCT) of the heart using different tube voltages (80 kVp, 100 kVp, 120 kVp) and compare it with calculated values. A female Alderson-Rando phantom was equipped with thermoluminescent dosimeters (TLDs...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-005-0124-y
更新日期：2006-08-01 00:00:00
abstract：:CT-guided procedures remain an important tool for diagnosis and tissue acquisition for primary diagnosis and molecular/tissue correlation. New imaging devices such as MDCT and PET/CT will improve diagnosis but percutaneous procedures will be needed to confirm and support new molecular and DNA treatments. Coagulopathic...
journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s10406-005-0130-9
更新日期：2005-11-01 00:00:00
abstract：INTRODUCTION:The aim of the study was to extract anthropometric measures from CT by deep learning and to evaluate their prognostic value in patients with non-small-cell lung cancer (NSCLC). METHODS:A convolutional neural network was trained to perform automatic segmentation of subcutaneous adipose tissue (SAT), viscer...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-019-06630-w
更新日期：2020-06-01 00:00:00
abstract：:The aim of this study was to correlate quantitative dynamic contrast-enhanced MRI (DCE MRI) parameters with microvessel density (MVD) in prostate carcinoma. Twenty-eight patients with biopsy-proven prostate carcinoma were examined by endorectal MRI including multiplanar T2- and T1-weighted spin-echo and dynamic T1-wei...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-003-2025-2
更新日期：2004-02-01 00:00:00
abstract：:Cardiovascular intervention, using MRI guidance, is challenging for clinical applications. Real-time imaging sequences with high spatial resolution are needed for monitoring intramyocardial delivery of drug, gene, or stem cell therapies. New generation MR scanners make local intramyocardial and vascular wall therapies...
journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s00330-004-2622-8
更新日期：2005-05-01 00:00:00
abstract：:Lesion area measurement in multiple sclerosis (MS) is one of the key points in evaluating the natural history and in monitoring the efficacy of treatments. This study was performed to check the intra- and inter-observer agreement variability of a locally developed Growing Region Segmentation Software (GRES), comparing...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s003300100978
更新日期：2002-04-01 00:00:00
abstract：:The aim of this study was to assess cross-sectional imaging features and the value of CT and MRI in primary hemangiopericytoma of bone. In five patients with histologically proven primary osseous hemangiopericytoma CT and MR scans were evaluated retrospectively. Both CT and MRI were available in four patients each. In...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s003300101027
更新日期：2002-01-01 00:00:00
abstract：OBJECTIVES:To investigate the feasibility of a newly developed noise reduction technique at coronary CT angiography (CTA) that uses multi-phase data-averaging and non-rigid image registration. METHODS:Sixty-five patients underwent coronary CTA with prospective ECG-triggering. The range of the phase window was set at 7...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-014-3381-9
更新日期：2015-01-01 00:00:00
abstract：OBJECTIVE:To compare the performance of synthetic mammography (SM) and digital mammography (DM) with digital breast tomosynthesis (DBT) or alone for the evaluation of microcalcifications. METHODS:This retrospective study includes 198 mammography cases, all with DM, SM, and DBT images, from January to October 2013. Thr...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-018-5585-x
更新日期：2019-01-01 00:00:00
abstract：OBJECTIVES:Complications following colorectal cancer resection are common. The degree of aortic calcification (AC) on CT has been proposed as a predictor of complications, particularly anastomotic leak. This study assessed the relationship between AC and complications in patients undergoing colorectal cancer resection....
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-020-07189-7
更新日期：2020-11-17 00:00:00
abstract：OBJECTIVES:To comprehensively and quantitatively analyse flow and vorticity in the right heart of patients after repair of tetralogy of Fallot (rTOF) compared with healthy volunteers. METHODS:Time-resolved flow-sensitive 4D MRI was acquired in 24 rTOF patients and 12 volunteers. Qualitative flow evaluation was based o...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-015-4186-1
更新日期：2016-10-01 00:00:00
abstract：:We assessed the value of three-dimensional (3D) dynamic magnetic resonance angiography (MRA) for the follow-up of patients with radiosurgically treated cerebral arteriovenous malformations (AVMs). Fifty-four patients with cerebral AVMs treated by radiosurgery (RS) were monitored using conventional catheter angiography...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-005-0011-6
更新日期：2006-03-01 00:00:00
abstract：OBJECTIVES:To review the role of imaging in the diagnosis of recurrent disease in previously treated non-small cell lung cancer (NSCLC) and discuss the imaging pitfalls. METHODS:A comprehensive review of published literature on CT and PET imaging of NSCLC recurrence was performed. Diagnostic and prognostic values are ...
journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s00330-011-2299-8
更新日期：2012-03-01 00:00:00
abstract：OBJECTIVES:The aims of this study were to examine whether visual MRI rating scales used in diagnostics of cognitive disorders can be estimated computationally and to compare the visual rating scales with their computed counterparts in differential diagnostics. METHODS:A set of volumetry and voxel-based morphometry ima...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-019-06067-1
更新日期：2019-09-01 00:00:00
abstract：PURPOSE:To analyse the accuracy of dual-energy contrast-enhanced spectral mammography in dense breasts in comparison with contrast-enhanced subtracted mammography (CESM) and conventional mammography (Mx). MATERIALS AND METHODS:CESM cases of dense breasts with histological proof were evaluated in the present study. Fou...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-014-3271-1
更新日期：2014-10-01 00:00:00
abstract：OBJECTIVES:To determine the feasibility of MRI texture analysis as a method of quantifying subchondral bone architecture in knee osteoarthritis (OA). METHODS:Asymptomatic subjects aged 20-30 (group 1, n = 10), symptomatic patients aged 40-50 (group 2, n = 10) and patients scheduled for knee replacement aged 55-85 (gro...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-015-4142-0
更新日期：2016-09-01 00:00:00
abstract：OBJECTIVES:To determine meniscal extrusion and cartilage coverage on magnetic resonance (MR) images and factors associated with these parameters in knees of middle-aged and elderly persons free from radiographic tibiofemoral osteoarthritis (OA). METHODS:Seven hundred eighteen persons, free of radiographic tibiofemoral...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-018-5741-3
更新日期：2019-04-01 00:00:00
abstract：AIM:To describe the effect of hepatobiliary-specific MR imaging contrast agent (HBCA) administration on the signal intensity of peritoneal and pleural fluid effusions on T1-weighted MR images. MATERIALS AND METHODS:From October 2015 to May 2016 139 patients (mean 60±10 years old, 69 % males) with peritoneal or pleural...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-017-5261-6
更新日期：2018-07-01 00:00:00
abstract：:Aortic dissection is the most frequent cause of aortic emergency, and its outcome is still frequently fatal. The management of this pathology has changed with the development of endovascular means. Nowadays, imaging modalities are helpful in management decision-making by providing information such as identification of...
journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s00330-004-2441-y
更新日期：2004-11-01 00:00:00
abstract：:The purpose was to assess the diagnostic accuracy of a hand-held Doppler ultrasound (US) machine for the bedside detection of liver and vascular abnormalities after liver transplantation in the intensive care unit. The IRB approved this study, and written informed consent was obtained from all patients or the patient'...
journal_title：European radiology
pub_type： 临床试验,杂志文章
doi：10.1007/s00330-009-1417-3
更新日期：2009-10-01 00:00:00
abstract：:Positron emission tomography (PET) is a powerful molecular imaging technique for the human body-imaging applications currently available. As altered glucose metabolism is characteristic for many malignancies, FDG-PET is mostly used in oncology for staging and therapy control. Although PET is a sensitive tool for detec...
journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s00330-005-0088-y
更新日期：2006-05-01 00:00:00
abstract：OBJECTIVES:To verify the association between EGFR status and clinical response to microwave ablation (MWA) and survival. METHODS:NSCLC patients with known EGFR status and treated with MWA in combination with chemotherapy were retrospectively enrolled in the study. RESULTS:A total of 61 patients were recruited. EGFR m...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-016-4474-4
更新日期：2017-04-01 00:00:00
abstract：OBJECTIVES:The degree and status of white matter myelination can be sensitively monitored using diffusion tensor imaging (DTI). This study looks at the measurement of fractional anistropy (FA) and mean diffusivity (MD) using an automated ROI with an existing DTI atlas. METHODS:Anatomical MRI and structural DTI were pe...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-012-2396-3
更新日期：2012-07-01 00:00:00
