Abstract：
:The aim of this study was to demonstrate that dose reduction and constant image quality can be achieved by adjusting X-ray dose to patient size. To establish the relation between patient size, image quality and dose we scanned 19 patients with reduced dose. Image noise was measured. Four radiologists scored image quality subjectively, whereby a higher score meant less image quality. A reference patient diameter was determined for which the dose was just sufficient. Then 22 patients were scanned with the X-ray dose adjusted to their size. Again, image noise was measured and subjective image quality was scored. The dose reduction compared with the standard protocol was calculated. In the first group the measured noise was correlated to the patient diameter (rho=0.78). This correlation is lost in the second group (rho=-0.13). The correlation between patient diameter and subjective image quality scores changes from rho=0.60 (group 1) to rho=-0.69 (group 2). Compared with the standard protocol, the dose was reduced (mean 28%, range 0-76%) in 19 of 22 patients (86%). Dose reduction and constant noise can be achieved when the X-ray dose is adjusted to the patient diameter. With constant image noise the subjective image quality increases with larger patients.
journal_name
Eur Radioljournal_title
European radiologyauthors
Wilting JE,Zwartkruis A,van Leeuwen MS,Timmer J,Kamphuis AG,Feldberg Mdoi
10.1007/s003300101039subject
Has Abstractpub_date
2001-01-01 00:00:00pages
2627-32issue
12eissn
0938-7994issn
1432-1084journal_volume
11pub_type
杂志文章abstract：:Recently, a new oral liver-specific manganese-based MR agent (CMC-001) has been introduced. This contrast medium is delivered to the liver in high concentrations in the portal vein and very low doses in the hepatic artery, as only small amounts of manganese enter the general circulation. It is taken up by the hepatocy...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-006-0336-9
更新日期：2007-01-01 00:00:00
abstract：OBJECTIVES:To explore and evaluate the feasibility of radiomics in stratifying nasopharyngeal carcinoma (NPC) into distinct survival subgroups through multi-modalities MRI. METHODS:A total of 658 patients (training cohort: 424; validation cohort: 234) with non-metastatic NPC were enrolled in the retrospective analysis...
journal_title：European radiology
pub_type： 杂志文章
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更新日期：2019-10-01 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
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journal_title：European radiology
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abstract：OBJECTIVES:The aim of the present study was to histologically compare chondrotoxicity in surgically harvested intervertebral discs (IVDs) of patients following discoblock, discography, or no preoperative intervention. METHODS:Thirty patients (IVD degeneration Modic ≥ 2°, Pfirrmann 3° or 4°) at L4/5 or L5/S1 who were p...
journal_title：European radiology
pub_type： 杂志文章,随机对照试验
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更新日期：2017-01-01 00:00:00
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journal_title：European radiology
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pub_type： 杂志文章
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journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s003300050228
更新日期：1997-01-01 00:00:00
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更新日期：2009-11-01 00:00:00
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journal_title：European radiology
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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...
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pub_type： 评论,信件
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更新日期：2018-11-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章,评审
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journal_title：European radiology
pub_type： 杂志文章,评审
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journal_title：European radiology
pub_type： 杂志文章
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更新日期：1997-01-01 00:00:00
abstract：OBJECTIVE:To assess diagnostic reference levels (DRLs) in surgery for the most frequent procedures as required by the European Directive 2013/59/Euratom. METHODS:A survey was conducted in six centers. Eight orthopedic, urology and gastrointestinal surgical procedures were analyzed. Kerma area product (KAP) and fluoros...
journal_title：European radiology
pub_type： 杂志文章,多中心研究
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更新日期：2019-02-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章
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更新日期：2008-08-01 00:00:00
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pub_type： 杂志文章
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更新日期：2003-04-01 00:00:00
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更新日期：2002-12-01 00:00:00
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更新日期：2005-02-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章,多中心研究,随机对照试验
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更新日期：2016-03-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章
doi：
更新日期：2003-12-01 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
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