Abstract:
PURPOSE:Detection of pulmonary metastases is still a challenging task for magnetic resonance imaging (MRI). It was the aim of this study to evaluate the potential of a free-breathing move-during-scan turbo inversion recovery magnitude sequence for the detection of pulmonary nodules. MATERIALS AND METHODS:The sensitivities and positive-predictive values of 2 radiologists to detect pulmonary nodules in 41 move-during-scan MRI examinations of 38 patients with different malignancies were calculated and subgroup analyses according to lesion size and localization were performed. Multidetector computed tomography served as the standard of reference. Additionally, 6 radiologists rated the confidence for the presence of nodular lesions in 212 regions-of-interest, which were randomly selected to represent lesions of various sizes as well as negative findings. Receiver-operator-characteristic was performed. RESULTS:Three hundred twenty-one nodules were found in 30 patients by multidetector computed tomography. Sensitivity and specificity of MRI to detect pulmonary nodules larger than 3 mm on a per-patient basis were 81.8% and 94.7%, respectively. On a per-lesion basis, MRI revealed a sensitivity of 79.0% to 80.7% for lesions larger than 3 mm, if high conspicuity ratings were counted as positive, and 84.6%, if medium and high conspicuity ratings were counted as positive. Sensitivity increased uniformly with lesion size, and all lesions larger than 12 mm were detected. Receiver-operator-characteristic analysis revealed a mean accuracy of 0.90 and sensitivities over 90% for lesions larger than 3 mm with a specificity of 96.1%. For lesions larger than 6 mm the accuracy was 0.99. CONCLUSION:Detection of pulmonary nodules with a move-during-scan turbo inversion recovery magnitude sequence is feasible. Excellent detection of lesions larger than 6 mm is achievable with free-breathing moving-table MRI.
journal_name
Invest Radioljournal_title
Investigative radiologyauthors
Baumann T,Ludwig U,Pache G,Gall C,Saueressig U,Fisch D,Stankovic Z,Bartholomae JP,Honal M,Bley TA,Langer M,Schaefer Odoi
10.1097/RLI.0b013e31816901fasubject
Has Abstractpub_date
2008-06-01 00:00:00pages
359-67issue
6eissn
0020-9996issn
1536-0210journal_volume
43pub_type
杂志文章abstract:OBJECTIVES:The aim of this study was to evaluate the effect of structured reports (SRs) in comparison to nonstructured, free-text (FT) rectal magnetic resonance imaging (MRI) reports in patients with histologically proven rectal cancer and potential effects of both types of reporting on referring surgeons' satisfaction...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000336
更新日期:2017-04-01 00:00:00
abstract::The morphologic changes in healthy rat kidneys (n = 102) were studied 2 or 48 hours after intravenous injection of 1 or 3 g iodine (I)/kg of high-osmolality diatrizoate, low-osmolality iopromide and iohexol, or iso-osmolality iotrolan, as well as after 0.2 or 0.6 g/kg of the high-osmolality magnetic resonance contrast...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199110000-00009
更新日期:1991-10-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:We investigated whether it is possible to investigate degenerative changes in human tissue on a sub-100-microm resolution scale not only on special high-field small-bore MR-microscopy systems but also on a 3T whole-body MR-scanner. METHODS:Spin-spin relaxation, proton density, and diffusion mi...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.RLI.0000068620.17569.83
更新日期:2003-07-01 00:00:00
abstract::Radiolabeled ioversol was injected intravenously into two male and two female beagle dogs (6.7 to 10.4 kg) at two dose levels each (0.2 and 1.0 g I/kg). Blood levels of radioactivity were monitored at 2, 5, 10, 20, 40, 60, 90, and 120 minutes and at one and two days. Urine and feces were collected in metabolism cages ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198906001-00005
更新日期:1989-06-01 00:00:00
abstract::An isotopic radiation source 125I was investigated for use in soft tissue radiaography, with particular attention to possible use in mammography for mass screening. Film sensitivities, exposure rates, absorbed doeses, contrast and resolution were determined, and compared to conventional x-ray units. It was found that ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197509000-00007
更新日期:1975-09-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To demonstrate the usefulness of a model of the parenchymous vascularization to evaluate texture analysis methods. METHODS:Slices with thickness varying from 1 to 4 mm were reformatted from a 3D vascular model corresponding to either normal tissue perfusion or local hypervascularization. Param...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199903000-00004
更新日期:1999-03-01 00:00:00
abstract::For magnetic resonance, the established class of intravenous contrast media is the gadolinium-based contrast agents. In the 3 decades since initial approval, these have proven in general to be very safe for human administration. However, in 2006, a devastating late adverse reaction to administration of the less stable...
journal_title:Investigative radiology
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journal_title:Investigative radiology
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doi:10.1097/00004424-199307000-00011
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abstract:OBJECTIVES:To prospectively evaluate the image quality and diagnostic accuracy of magnetic resonance cholangiopancreatography (MRCP) at 3.0 T compared with that at 1.5 T used for patients. MATERIALS AND METHODS:This study was approved by our institutional review board, and informed consent was obtained from all patien...
journal_title:Investigative radiology
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doi:10.1097/RLI.0b013e3181b4c0ae
更新日期:2009-09-01 00:00:00
abstract::Prior studies of the opacification-phase effects of left ventricular (LV) injection of angiographic contrast medium (CM) on LV size and function have yielded discrepant results. A sensitive ultrasonic technique was used to measure LV dimension (Di) in 10 open-chest dogs with physiologic heart rates, and injection of s...
journal_title:Investigative radiology
pub_type: 杂志文章
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更新日期:1982-09-01 00:00:00
abstract::The absorbed levels of ethanol or tetracycline, used as gallbladder sclerosing agents, were measured in the systemic blood circulation of 16 rabbits. The maximal systemic level of ethanol was 46 mg/dl and of tetracycline was 4.6 micrograms/ml after 30 minutes of gallbladder exposure. Comparable serum levels would be c...
journal_title:Investigative radiology
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doi:10.1097/00004424-198605000-00005
更新日期:1986-05-01 00:00:00
abstract::Diagnostic radiology is expanding, playing an increasingly central role in patient care, which heightens the importance of radiology teaching in undergraduate medical education. This study examined the impact of increased structure and systematic evaluation on student performance in a radiology elective. The evaluatio...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198505000-00003
更新日期:1985-05-01 00:00:00
abstract::Polylysine covalently linked to moieties of gadopentetate (Gd-DTPA), for use as a macromolecular blood pool marker for contrast material-enhanced magnetic resonance imaging (MRI), was characterized by means of physicochemical measurements and pharmacokinetics in rats and rabbits and compared with Gd-DTPA. Gd-DTPA-poly...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199111000-00008
更新日期:1991-11-01 00:00:00
abstract::The application of intravenous, intrathecal, and inhalation enhancement techniques to the CT evaluation of the nonhuman primate (Papio cynocephalus/anubis) is described. The falx cerebri cortical vasculature, vein of Galen, straight sinus and tentorium cerebelli were defined with intravenous enhancement. Intrathecal C...
journal_title:Investigative radiology
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doi:10.1097/00004424-197901000-00014
更新日期:1979-01-01 00:00:00
abstract:OBJECTIVES:To evaluate the potential of quantitative assays of vascular characteristics based on dynamic contrast-enhanced magnetic resonance imaging (MRI) using a macromolecular contrast medium (MMCM) to search for and measure effects of dimethyl sulfoxide (DMSO) on cancer vasculature with microscopic correlations. M...
journal_title:Investigative radiology
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doi:10.1097/RLI.0b013e318164b71d
更新日期:2008-05-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:To develop a new animal model for the evaluation of the renal tolerance of contrast agent and its application to diatrizoate and iotrolan injections in comparison to saline and mannitol solution. MATERIALS AND METHODS:The nephrotoxic potential of intravenously injected contrast agents in Beagl...
journal_title:Investigative radiology
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doi:10.1097/01.rli.0000087096.61127.13
更新日期:2003-11-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The authors analyze the origins of the "clotting issue," the controversy that began in the 1980s when contrast media, once perceived as good flushing agents for catheters because of their assumed anticoagulant properties, came under attack for allegedly causing thromboembolism. Laboratory studi...
journal_title:Investigative radiology
pub_type: 杂志文章,评审
doi:
更新日期:1993-11-01 00:00:00
abstract::Gelatin encapsulated nitrogen microbubbles were effective ultrasonic contrast agents in in vitro phantom and in vivo rabbit V2 carcinoma studies. Intra-arterial injection of 80-micrometer gelatin encapsulated nitrogen microbubbles appeared to improve tumor visualization by rim enhancement, which persisted for several ...
journal_title:Investigative radiology
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doi:10.1097/00004424-198005000-00013
更新日期:1980-05-01 00:00:00
abstract::Proposed causes of renal papillary necrosis (RPN) include tubular toxicity due to hyperconcentration of toxins in the renal medulla and vasoconstriction of medullary vessels with ischemic necrosis. The authors studied these mechanisms in bromoethylamine hydrobromide-induced RPN in rats by microvascular and tubular mic...
journal_title:Investigative radiology
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doi:10.1097/00004424-198103000-00006
更新日期:1981-03-01 00:00:00
abstract::Because of relatively low acute toxicity, iosulamide meglumine has been recommended as an improved contrast material for intravenous cholangiography. It has been postulated that high doses of the compound could be given safely with the expectation of achieving greater biliary excretion and improved opacification of th...
journal_title:Investigative radiology
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doi:10.1097/00004424-198105000-00016
更新日期:1981-05-01 00:00:00
abstract::A silicone gel phantom material is described. It can be molded into any shape and it can contain internal cavities. The material is selfsealing allowing the cavities to be filled with liquids. A simple geometric phantom consisting of a rectangular solid with a single internal spherical cavity was fabricated and imaged...
journal_title:Investigative radiology
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doi:10.1097/00004424-198702000-00013
更新日期:1987-02-01 00:00:00
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journal_title:Investigative radiology
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更新日期:2018-11-01 00:00:00
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journal_title:Investigative radiology
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doi:10.1097/00004424-199912000-00003
更新日期:1999-12-01 00:00:00
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journal_title:Investigative radiology
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更新日期:2018-08-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199001000-00014
更新日期:1990-01-01 00:00:00
abstract::The magnitude and timing of the effects of postural change on pulmonary blood flow distribution were studied in dogs by means of computed tomography (CT) and radioactive microspheres. A change in the mean attenuation values was demonstrated by CT in the anterior and posterior lung zones after change from the supine to...
journal_title:Investigative radiology
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doi:10.1097/00004424-198211000-00007
更新日期:1982-11-01 00:00:00
abstract::Maximum likelihood estimation, assuming a binormal model, has been used extensively to estimate the area under receiver operating characteristic (ROC) curves and thus provide an index of diagnostic accuracy for the comparison of two imaging systems. However, in some instances, a degenerate data set results in a fitted...
journal_title:Investigative radiology
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doi:10.1097/00004424-199007000-00016
更新日期:1990-07-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The purpose of the study was to evaluate the effect of articular fluid distention on patellar position at different degrees of knee angulation. METHODS:Patellar position in 10 cadaveric knee specimens was determined with 30, 100, and 200 mm Hg joint distention at 45, 20, and 5 degrees of knee ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199602000-00001
更新日期:1996-02-01 00:00:00
abstract::Sixteen observers averaging 7.4 years experience in interpreting radiology images and 16 observers without radiology training were tested for their ability to detect low-contrast signals in structured noise backgrounds using a digital display system. No significant difference in true positives, false positives, time t...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198704000-00006
更新日期:1987-04-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:A computerized system that applies the case-based approach to training radiologists to diagnose brain tumors was designed. The authors attempted to provide residents a tool that supports their visual memory and inducts case-based reasoning. METHODS:A relational database with a digital image li...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199404000-00020
更新日期:1994-04-01 00:00:00