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 efficiency in relation to patient dose, each screen was X-rayed using 40-120 kVp and the number of light photons emitted per X-ray incident was experimentally and theoretically evaluated. Additionally, the capability of the emitted light to sensitize films or to generate electrons in silicon photodiodes used in digital imaging systems was examined. Y2O2S:Eu screens were most efficient in light emission, and when combined with either red sensitive films or Si photodiodes, they were found superior to Y2O3:Eu or YVO4:Eu screens in film grain or electron signal generation. In many cases they were also found superior to terbium-activated phosphors. Provided that several problems related to industrial production (special dyes, reflective backing, crossover effects) are dealt with, those europium-activated screens could be employed in low-tube-voltage radiographic applications.
journal_name
Eur Radioljournal_title
European radiologyauthors
Kandarakis I,Cavouras D,Panayiotakis GS,Triantis D,Nomicos CDdoi
10.1007/s003300050387subject
Has Abstractpub_date
1998-01-01 00:00:00pages
313-8issue
2eissn
0938-7994issn
1432-1084journal_volume
8pub_type
杂志文章abstract：OBJECTIVES:To evaluate a new approach for reconstructing angiographic images by application of wavelet transforms on CT perfusion data. METHODS:Fifteen consecutive patients with suspected stroke were examined with a multi-detector CT acquiring 32 dynamic phases (∆t = 1.5s) of 99 slices (total slab thickness 99mm) at 8...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-015-3651-1
更新日期：2015-08-01 00:00:00
abstract：OBJECTIVES:To assess the treatment-induced changes of health-related quality-of-life (HRQoL) in patients with venous malformations (VM) who underwent ethanol gel sclerotherapy. METHODS:The prospective study in children and adults was approved by the local ethics committee. 31 patients (mean age 23.42 years, range 6.6 ...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-016-4603-0
更新日期：2017-06-01 00:00:00
abstract：OBJECTIVES:High radiation dose during CT perfusion (CTp) studies contributes to prevent CTp application in daily clinical practice. This work evaluates the consequences of scan delay on perfusion parameters and provides guidelines to help reducing the radiation dose by choosing the most appropriate delay. METHODS:Fift...
journal_title：European radiology
pub_type： 杂志文章,多中心研究
doi：10.1007/s00330-019-06259-9
更新日期：2019-12-01 00:00:00
abstract：OBJECTIVES:The aim of this study was to evaluate the diagnostic performance of introducing diffusion-weighted imaging (DWI) as a major feature to extracellular agent (ECA)-MRI for diagnosing HCC in comparison with gadoxetic acid (hepatobiliary agent, HBA)-MRI using Liver Imaging Reporting and Data System (LI-RADS) v201...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-020-06753-5
更新日期：2020-07-01 00:00:00
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 the...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-003-2206-z
更新日期：2004-05-01 00:00:00
abstract：OBJECTIVE:To evaluate MRI features of response of primary extremity liposarcoma (LPS) to neoadjuvant radiation therapy (RT) with histopathologic correlation. METHODS:In this IRB-approved study including 125 patients with extremity LPS treated with neoadjuvant RT from 2000 to 2013, MRI of the primary tumour in 18 patie...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-015-3953-3
更新日期：2016-05-01 00:00:00
abstract：OBJECTIVE:To assess the discrepancy rate for the interpretation of abdominal and pelvic computed tomography (CT) examinations among experienced radiologists. METHODS:Ninety abdominal and pelvic CT examinations reported by three experienced radiologists who specialize in abdominal imaging were randomly selected from th...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-010-1763-1
更新日期：2010-08-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-006-0381-4
更新日期：2007-04-01 00:00:00
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journal_title：European radiology
pub_type： 临床试验,杂志文章
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更新日期：2001-01-01 00:00:00
abstract：OBJECTIVE:To retrospectively evaluate the diagnostic performance of single-phase dual-energy CT (DECT) with virtual non-contrast CT (VNCT) compared with three-phase CT urography (CTU) in patients with haematuria. METHODS:A total of 296 patients underwent three-phase CTU (NCT at 120 kVp; nephrographic phase and excreto...
journal_title：European radiology
pub_type： 杂志文章
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更新日期：2016-10-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00330-003-2025-2
更新日期：2004-02-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-008-1060-4
更新日期：2008-11-01 00:00:00
abstract：OBJECTIVES:To study linear and volumetric adrenal measurements, their reproducibility, and correlations between total adrenal volume (TAV) and adrenal micronodularity, age, gender, body mass index (BMI), visceral (VAAT) and subcutaneous adipose tissue volume (SAAT), presence of diabetes, chronic alcoholic abuse and chr...
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更新日期：2016-08-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-020-07200-1
更新日期：2021-02-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00330-002-1385-3
更新日期：2002-05-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00330-003-1898-4
更新日期：2003-10-01 00:00:00
abstract：OBJECTIVES:Core biopsy underestimates invasion in more than 20% of patients with preoperatively diagnosed ductal carcinoma in situ (DCIS) without evidence of invasion (pure DCIS). The aim of the current study was to evaluate the efficacy of preoperative magnetic resonance imaging (MRI) to discriminate between patients ...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-012-2394-5
更新日期：2012-07-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00330-012-2765-y
更新日期：2013-06-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00330-015-4029-0
更新日期：2016-06-01 00:00:00
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doi：10.1007/s00330-013-2992-x
更新日期：2014-01-01 00:00:00
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journal_title：European radiology
pub_type： 社论
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doi：10.1007/s00330-009-1532-1
更新日期：2010-01-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-001-1151-y
更新日期：2002-03-01 00:00:00
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pub_type： 杂志文章
doi：10.1007/s00330-003-2008-3
更新日期：2004-02-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s00330-004-2236-1
更新日期：2004-04-01 00:00:00
abstract：:Carcinoid heart disease is a frequent complication of the carcinoid syndrome, usually presenting as right-sided valvular heart disease. Although the diagnosis is most often made with cardiac ultrasound, MRI and CT are valuable techniques for diagnosing carcinoid heart disease. ...
journal_title：European radiology
pub_type： 杂志文章
doi：
更新日期：2003-12-01 00:00:00
abstract：:Because of the increasing incidence of primary central nervous system lymphoma (PCNSL), it is essential to recognize this disease in order to start appropriate treatment. We present the characteristic CT and MRI features of this tumour. The findings of 32 CT and 31 MR of 37 immunocompetent patients with biopsy-proved ...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s003300101037
更新日期：2002-02-01 00:00:00
abstract：OBJECTIVES:Peripheral bone infection (PBI) and prosthetic joint infection (PJI) are two different infectious conditions of the musculoskeletal system. They have in common to be quite challenging to be diagnosed and no clear diagnostic flowchart has been established. Thus, a conjoined initiative on these two topics has ...
journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s00330-019-06326-1
更新日期：2019-12-01 00:00:00
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journal_title：European radiology
pub_type： 杂志文章,评审
doi：10.1007/s00330-003-2065-7
更新日期：2004-03-01 00:00:00
abstract：OBJECTIVES:To assess the usefulness of C-arm cone-beam computed tomography (CBCT) virtual navigation-guided percutaneous mediastinal mass biopsy in terms of diagnostic accuracy and complication rates. METHODS:Seventy-eight CBCT virtual navigation-guided percutaneous mediastinal mass biopsies were performed in 75 patie...
journal_title：European radiology
pub_type： 杂志文章
doi：10.1007/s00330-015-3762-8
更新日期：2015-12-01 00:00:00
