Abstract:
PURPOSE:Pathological changes of the peripheral pulmonary arteries induce pulmonary arterial hypertension (PAH). Aim of this study was to quantitatively assess the effect of PAH on pulmonary perfusion by 3D-MR-perfusion techniques and to compare findings to healthy controls. Furthermore, quantitative perfusion data were correlated with invasive pressure measurements. MATERIAL AND METHODS:Five volunteers and 20 PAH patients (WHO class II or III) were examined using a 1.5T MR scanner. Measurement of pulmonary perfusion was done in an inspiratory breathhold (FLASH3D; 3.5 mm x 1.9 mm x 4mm; TA per 3D dataset 1.5s). Injection of contrast media (0.1 mmol Gd-DTPA/kg BW) and image acquisition were started simultaneously. Evaluation of 3D perfusion was done using singular value decomposition. Lung borders were outlined manually. Each lung volume was divided into three regions (anterior, middle, posterior), and the following parameters were assessed: Time-to-Peak (TTP), blood flow (PBF), blood volume (PBV), and mean transit time (MTT). In 10 patients invasive pulmonary artery pressure measurements were available and correlated to the perfusion measurements. RESULTS:In both, controls and patients, an anterior-to-posterior gradient with higher PBF and PBV posterior was observed. In the posterior lung region, a significant difference (p<0.05) was found for TTP (12s versus 16s) and MTT (4s versus 6s) between volunteers and patients. PBF and PBV were lower in patients than in volunteers (i.e. dorsal regions: 124 versus 180 ml/100 ml/min and 10 versus 12 ml/100 ml), but the difference failed to be significant. The ratio of PBF and PBV between the posterior and the middle or ventral regions showed no difference between both groups. A moderate linear correlation between mean pulmonary arterial pressure (mPAP) and PBV (r=0.51) and MTT (r=0.56) was found. CONCLUSION:The only measurable effect of PAH on pulmonary perfusion is a prolonging of the MTT. There is only a moderate linear correlation of invasive mPAP with PBV and MTT.
journal_name
Eur J Radioljournal_title
European journal of radiologyauthors
Ley S,Mereles D,Risse F,Grünig E,Ley-Zaporozhan J,Tecer Z,Puderbach M,Fink C,Kauczor HUdoi
10.1016/j.ejrad.2006.08.028subject
Has Abstractpub_date
2007-02-01 00:00:00pages
251-5issue
2eissn
0720-048Xissn
1872-7727pii
S0720-048X(06)00368-8journal_volume
61pub_type
杂志文章abstract::Today US plays an important and increasing role in the assessment of many, partially age-specific conditions in the GI tract in neonates, infants and children. Knowledge of the potential capabilities of US and its restrictions together with a skillful performance of GI US examination can provide essential anatomic and...
journal_title:European journal of radiology
pub_type: 杂志文章,评审
doi:10.1016/j.ejrad.2014.04.016
更新日期:2014-09-01 00:00:00
abstract:PURPOSE:Evaluation of percutaneous recanalization of obstructed iliac as well as superficial femoral arteries (SFAs) in patients with peripheral arterial obstructive disease (PAOD). MATERIAL AND METHODS:The data of 195 consecutive patients with 285 obstructions of the common and or external iliac artery as well as the...
journal_title:European journal of radiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.ejrad.2010.04.016
更新日期:2010-07-01 00:00:00
abstract::In an effort to achieve efficient image management in clinical neurosurgery utilizing a local image filing system (EFPACS, Fuji Electric Co., Ltd), adequate image-processing and display techniques were developed. One is a method whereby the anatomical location of the thalamic and basal ganglion lesions is determined b...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/0720-048x(90)90092-p
更新日期:1990-01-01 00:00:00
abstract:PURPOSE:Investigation of potential improvements in dynamic CT perfusion measurements by exploitation of improved visualization of contrast agent in virtual monoenergetic reconstructions of images acquired with dual-energy computed tomography (DECT). METHOD:For 17 patients with pancreatic carcinoma, dynamic dual-source...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2020.109262
更新日期:2020-10-01 00:00:00
abstract:OBJECTIVES:To retrospectively evaluate the effects of a speckle reduction algorithm on radiologists' diagnosis of malignant and benign breast lesions on ultrasound (US) images. METHODS:Using a database of 603 breast (US) images of 211 cases (109 benign lesions and 102 malignant ones), the original and speckle-reduced ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2009.10.001
更新日期:2010-07-01 00:00:00
abstract::A double curve catheter for the left axillary artery approach to aortofemoral, selective renal and visceral angiography is described. The catheter shape enables a fast and easy catheterization of the abdominal aorta. Up till now no complications have been encountered. ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:
更新日期:1984-08-01 00:00:00
abstract:PURPOSE:The aim of this study was to characterize the CT features of retroperitoneal neurilemmoma. METHODS:The CT findings were reviewed in seven patients with retroperitoneal neurilemmoma. RESULTS:All of the tumours were well-demarcated round or oval masses. In five cases, heterogeneous contrast enhancement was note...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/s0720-048x(97)00032-6
更新日期:1998-03-01 00:00:00
abstract:OBJECTIVES:To compare the detectability of perfusion difference between normal and undescended testes (UDT) in young children using conventional Power Doppler Imaging (PDI) and Superb Microvascular Imaging (SMI). METHODS:We prospectively performed testicular ultrasonography including PDI and SMI for the evaluation of ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2015.12.023
更新日期:2016-03-01 00:00:00
abstract::Fractures involving the articulating surfaces of bone are a common cause of joint disability. Management options are as numerous as the terms used to describe these lesions. These terms include osteochondral, transchondral, flake or chip fractures as well as osteochondrosis (osteochondritis) dissecans. The understandi...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/0720-048x(95)00707-w
更新日期:1996-03-01 00:00:00
abstract::The development of a computer-based radiologic total lung capacity (TLC) measurement system designed to be used by non-physician personnel is detailed. Four operators tested the reliability and validity of the system by measuring inspiratory PA and lateral pediatric chest radiographs with a Graf spark pen interfaced t...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:
更新日期:1986-11-01 00:00:00
abstract:AIM:The atrium septum is tilted in heart. There is an angle between atrium septum and the cross section of body, which is called tilt angles of atrium septum (TAAS) in this study, however this angle has not been specifically mentioned in literatures. In this article TAAS was measured and analysed on axial images of con...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2011.01.040
更新日期:2012-01-01 00:00:00
abstract:PURPOSE:To test a single-energy low-voltage CT protocol for pancreatic adenocarcinoma. METHODS AND MATERIALS:A total of 30 patients with pathology-proven pancreatic adenocarcinoma underwent 64-row MDCT with arterial phase at 80 kV and were compared to a similar group of 30 patients scanned with a 120 kV protocol. Scan...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2013.12.022
更新日期:2014-03-01 00:00:00
abstract::Twenty-eight children with femoral shaft fractures, treated with early spica cast, were evaluated with computed tomography (CT), for their femoral shaft rotational deformities. The femoral torsion angles were measured on both sides. If the torsion angle of the fractured side was more than the other side, it was consid...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/s0720-048x(02)00256-5
更新日期:2003-07-01 00:00:00
abstract::The purpose of this study was to evaluate by CT the usefulness of the non-distension of the stomach in determining invasion of the gastric cancer into perigastric space and adjacent organs. Forty-eight patients with pathologically proved gastric cancer were studied by conventional CT. Patients were examined using two ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/s0720-048x(98)00024-2
更新日期:1998-11-01 00:00:00
abstract:PURPOSE:To identify differences in the radiological findings of invasive pulmonary aspergillosis (IPA) among patients classified by severity of neutropenia, and differences in underlying disease. MATERIALS AND METHODS:We retrospectively reviewed computed tomography (CT) scans from the time of the diagnosis of IPA in 8...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2020.109042
更新日期:2020-10-01 00:00:00
abstract::Peripheral digital angiography can be applied with automated stepping and in digital subtracted technique to evaluate the complete lower extremities angiographically with one single injection of contrast medium. Altogether 25 DSA-examinations were compared with non-substracted technique. By DSA-technique additional se...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/0720-048x(91)90056-2
更新日期:1991-07-01 00:00:00
abstract:PURPOSE:Osteoradionecrosis (ORN) is a serious complication after radiotherapy (RT), even in the era of intensity modulated radiation therapy (IMRT). The purpose of this study was to evaluate whether 18F-FDG PET/CT can predict ORN associated with periodontal disease in patients with oropharyngeal or oral cavity squamous...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2020.109259
更新日期:2020-11-01 00:00:00
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::As a special subgroup of multiple intracranial aneurysms, mirror aneurysms are located bilaterally on the corresponding intracranial arteries. The current study sought to compare the clinical and demographic features of patients harboring mirror aneurysm, and to elucidate the corresponding risk factors. We performed a...
journal_title:European journal of radiology
pub_type: 杂志文章,多中心研究
doi:10.1016/j.ejrad.2017.09.015
更新日期:2017-11-01 00:00:00
abstract::Arterial embolisation was performed in five paediatric patients. Indications were hypersplenism in two, gastrointestinal bleeding in two and treatment of an aneurysmal bone cyst in one. Embolisation provided definitive treatment in each case with no complications. ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:
更新日期:1984-05-01 00:00:00
abstract:AIM:Positron emission tomography (PET) using F18-flurodeoxy-glucose (FDG) has been widely used for reflecting cellular metabolism. However, the feasibility of FDG PET in the diagnosis of hepatocellular carcinoma (HCC) is limited. The aim of the study was to assess the ability of FDG PET (PET/CT) in the detection of ext...
journal_title:European journal of radiology
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.ejrad.2011.08.004
更新日期:2012-09-01 00:00:00
abstract::The American College of Radiology Task Force on Breast Cancer published in 2003 the fourth edition of BI-RADS for Mammography. It is a lexicon of mammography terms including illustrations of each feature described, followed by a reporting format with assessment categories according to the degree of concern. The aim is...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2006.08.032
更新日期:2007-02-01 00:00:00
abstract::Sonography has been used to evaluate 50 "asymptomatic" infants (aged from birth up to two years) with typical appearing thymus on chest X-ray. The ultrasonic features of the normal gland are described. Moreover, the contribution of ultrasound is illustrated by five cases of partially ectopic thymus and by one case of ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:
更新日期:1987-05-01 00:00:00
abstract:PURPOSE:The purpose of this study was to prospectively determine the diagnostic accuracy of diffusion-weighted imaging (DWI) using MRI in the staging of thoracic lymph nodes in patients with lung cancer, and to compare the performance to that of PET/CT. PATIENTS AND METHOD:20 consecutive patients (pts) with histologic...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2010.09.001
更新日期:2012-01-01 00:00:00
abstract::This is a retrospective study of a series of seven patients with pancreatic metastases studied by ultrasonography and computed tomography. They were detected during tumor staging, or in the follow-up period of over 10 years of patients with advanced known malignancy. Lesions were multiple in two patients and solitary ...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/0720-048x(91)90131-e
更新日期:1991-01-01 00:00:00
abstract:PURPOSE:CT is considered the non-invasive gold standard for evaluating cardiac implantable electronic devices (CIEDs) lead perforation, but metal artifacts caused by the lead tip affect the image quality and make a definitive diagnosis challenging. We compared the performances of the metal artifact reduction (MAR) algo...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2021.109530
更新日期:2021-01-09 00:00:00
abstract:PURPOSE:Groove pancreatitis is a rare focal form of chronic pancreatitis that occurs in the pancreaticoduodenal groove between the major and minor papillae, duodenum and pancreatic head. Radiologic appearance and clinical presentation can result in suspicion of malignancy rendering pancreaticoduodenectomy inevitable. T...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2014.05.019
更新日期:2014-08-01 00:00:00
abstract:PURPOSE:Cinematic rendering (CR), a recently launched, FDA-approved rendering technique converts CT image datasets into nearly photorealistic 3D reconstructions by using a unique lighting model. The purpose of this study was to compare CR to volume rendering technique (VRT) images in the preoperative visualization of m...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2020.108911
更新日期:2020-05-01 00:00:00
abstract:PURPOSE:To investigate the value of diffusion-weighted MR imaging (DWI), especially apparent diffusion coefficient (ADC) in the differentiation of uterine adenomyosis and leiomyoma. MATERIALS AND METHODS:17 patients with uterine leiomyoma and 22 patients with uterine adenomyosis underwent diffusion-weighted imaging (D...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2011.03.026
更新日期:2011-08-01 00:00:00
abstract:BACKGROUND AND PURPOSE:Grading of cerebral gliomas is important both in treatment decision and assessment of prognosis. The purpose of this study was to determine the diagnostic accuracy of grading cerebral gliomas by assessing the tumor heterogeneity using MRI texture analysis (MRTA). MATERIAL AND METHODS:95 patients...
journal_title:European journal of radiology
pub_type: 杂志文章
doi:10.1016/j.ejrad.2016.01.013
更新日期:2016-04-01 00:00:00