Abstract:
PURPOSE:The aim was to investigate the feasibility and image quality of prospective respiratory gating for 3-D computed tomography (CT) of the lung. MATERIAL AND METHODS:Eight anesthetized pigs underwent prospectively gated multidetector computed tomography using 2 devices: a charge-coupled device (CCD) camera and a laser sensor. The output signal of both gating devices was connected to the scanner instead of ECG unit. Inspiratory and expiratory images were obtained during "free-breathing" and analyzed in MPR mode for sharpness of bronchi, diaphragm and lung using a 4-point-score (1, excellent to 4, severe artifacts). RESULTS:The CCD camera worked in all animals. Using the laser sensor, only 50% of expiratory scans could be acquired. All acquired images showed excellent sharpness (CCD camera vs. laser sensor) for trachea (1.1 +/- 0.3 vs. 1.3 +/- 0.5), bronchi (1.4 +/- 0.7 vs. 1.8 +/- 0.6), lung fissures (1.0 vs. 1.1 +/- 0.3), and lung parenchyma (1.0 +/- 0.2 vs. 1.4 +/- 0.6), and minor to major artifacts for diaphragm (1.5 +/- 0.8 vs. 2.0 +/- 1.0, P < 0.05) and pericardial lung structures (1.9 +/- 0.7 vs. 2.3 +/- 0.5). CONCLUSION:High image quality for inspiratory and expiratory scans was achieved by free-breathing 3-D CT of the lung using noncontact prospective respiratory gating.
journal_name
Invest Radioljournal_title
Investigative radiologyauthors
Zaporozhan J,Ley S,Unterhinninghofen R,Saito Y,Fabel-Schulte M,Keller S,Szabo G,Kauczor HUdoi
10.1097/01.rli.0000208926.98693.b6subject
Has Abstractpub_date
2006-05-01 00:00:00pages
468-75issue
5eissn
0020-9996issn
1536-0210pii
00004424-200605000-00007journal_volume
41pub_type
杂志文章abstract:RATIONALE AND OBJECTIVES:Bolus injection of iodinated contrast media has been observed to alter myocardial mechanical function, but the consequences on cellular metabolism are poorly documented. Modifications of metabolic parameters (intracellular pH as well as adenosine triphosphate [ATP], phosphocreatine, and inorgan...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199501000-00001
更新日期:1995-01-01 00:00:00
abstract:OBJECTIVES:To test the technique and feasibility of translating tumor suspicious region maps in the prostate, obtained by multimodality, anatomic, and functional 3T magnetic resonance imaging (MRI) data to 32-channel coil, T2-weighted (T2-w), 3T MR images, for directing MR-guided biopsies. Furthermore, to evaluate the ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e31817d0506
更新日期:2008-10-01 00:00:00
abstract::A 144cerium-induced osteosarcoma was transplanted to athymic nude rats (Han:rnu/rnu). Nineteen of the tumor-bearing animals were used to demonstrate the characteristics of the osteosarcoma on magnetic resonance imaging (MRI) in comparison with a group of nine animals that had not received any tumor transplant. The tum...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:
更新日期:1992-03-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:The effect of breathholding on pulmonary perfusion remains largely unknown. The aim of this study was to assess the effect of inspiratory and expiratory breathhold on pulmonary perfusion using quantitative pulmonary perfusion magnetic resonance imaging (MRI). METHODS AND RESULTS:Nine healthy v...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000149252.42679.78
更新日期:2005-02-01 00:00:00
abstract::Using cardiac-gated fast acquisition with multiple excitation (FAME), time curves of the cerebral aqueduct signals were derived in 19 healthy volunteers and 14 patients. A mean curve of the normal subjects was determined during systole. A relatively stable point of time was found at 270 msec after the R-wave supposed ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198911000-00004
更新日期:1989-11-01 00:00:00
abstract:RATIONALE AND OBJECTIVES:Magnetic resonance imaging (MRI) techniques seem to be very promising for 3D dosimetry studies, but long imaging acquisition time limits their use. A new fast T1 mapping protocol, easy to implement on a conventional MR imager, has been used to determine dose distributions on Fricke gels. METHO...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199903000-00014
更新日期:1999-03-01 00:00:00
abstract:OBJECTIVE:To demonstrate a method of assessing radiologic diagnostic agreement utilizing multiple blinded external readers. METHODS:Six body CT studies interpreted by one reader (primary reader) at the host institution were compiled with patient identifiers removed. Brief clinical histories that were available to the ...
journal_title:Investigative radiology
pub_type: 杂志文章
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更新日期:2010-04-01 00:00:00
abstract:OBJECTIVE:The objective of this study was to determine the gadolinium (Gd) concentration remaining in human bone tissue after administration of standard clinical doses of 2 Gd-based contrast agents: ProHance and Omniscan. MATERIALS AND METHODS:After administration of 0.1 mmol/kg of Gd chelate to patients undergoing hi...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000186569.32408.95
更新日期:2006-03-01 00:00:00
abstract::The authors present a numerical deconvolution technique to compensate for image degrading effects caused by scattered photons in radiographic chest images. Fourier transform techniques are used to deconvolve a shift invariant model of the two dimensional point spread response functions of the scattered radiation. This...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198901000-00008
更新日期:1989-01-01 00:00:00
abstract::Altered concentrations of brain beta endorphin and spinal cord encephalin have been reported in mice with iatrogenic arachnoiditis. We measured beta-endorphin concentration in cerebrospinal fluid (CSF) in normal monkeys and in monkeys with various degrees of arachnoiditis resulting from myelography and spinal surgery ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198803000-00006
更新日期:1988-03-01 00:00:00
abstract::Trypan blue and 197HgCl2 were used as markers of the increased leakage through the blood-brain barrier which developed after selective injection of different contrast media formulations into the internal carotid arteries of rabbits. Interest was focused on a new, experimental, nonionic medium (C-29) and possible effec...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197907000-00007
更新日期:1979-07-01 00:00:00
abstract::Thromboembolic complications occurring during angiography may result from a number of different causes. Catheters and guidewires can interact with blood to form thrombi; this tendency is related to wall defects and the chemical composition and structural characteristics of the catheters and guidewires. Nonthrombic sou...
journal_title:Investigative radiology
pub_type: 杂志文章,评审
doi:10.1097/00004424-198811002-00009
更新日期:1988-11-01 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
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e31819ca048
更新日期:2009-04-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/01.rli.0000155285.05672.cf
更新日期:2005-04-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e3181a8b015
更新日期:2009-08-01 00:00:00
abstract::Using simple surgical techniques, experimental carotid aneurysms are created which simulate some types of human berry aneurysms, both in hemodynamic and radiographic behavior. End to side anastomoses of an external jugular vein graft to the common carotid artery can be carried out by radiologic personnel with no forma...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197703000-00009
更新日期:1977-03-01 00:00:00
abstract:OBJECTIVES:The goal of this study was to demonstrate feasibility of measuring extracellular pH in cartilage and meniscus using acidoCEST technique with a 3-dimensional ultrashort echo time readout (acidoCEST-UTE) magnetic resonance imaging (MRI). MATERIALS AND METHODS:Magnetization transfer ratio asymmetry, radiofrequ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000576
更新日期:2019-09-01 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
pub_type: 杂志文章
doi:10.1097/00004424-198005000-00013
更新日期:1980-05-01 00:00:00
abstract:OBJECTIVE:To evaluate the feasibility of adenosine-stress dynamic myocardial volume perfusion imaging with second generation dual source computed tomography (CT) for the qualitative and quantitative assessment of myocardial blood flow (MBF) compared with stress perfusion and viability magnetic resonance imaging (MRI). ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e3181dfa2f2
更新日期:2010-06-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e3181e943d2
更新日期:2010-12-01 00:00:00
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journal_title:Investigative radiology
pub_type: 临床试验,杂志文章
doi:
更新日期:1985-01-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000256
更新日期:2016-08-01 00:00:00
abstract::Previous work has shown that Fe3+, when administered in the proper dose and time sequence, increases the tumor uptake of gallium-67 (67Ga) while decreasing its uptake by normal tissues. The purpose of this series of experiments was to examine further the postulate that the false carrier effect is mediated at the cellu...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198207000-00016
更新日期:1982-07-01 00:00:00
abstract:OBJECTIVES:The objectives of this study were to test the feasibility of an investigational dual-channel next-generation endorectal coil (NG-ERC) in vivo, to quantitatively assess signal-to-noise ratio (SNR), and to get an impression of image quality compared with the current clinically available single-loop endorectal ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0b013e3182a56678
更新日期:2014-01-01 00:00:00
abstract::Ionic (diatrizoate, ioxaglate) and nonionic (iohexol, iosimide, iopromide, and iotrolan) contrast media (CM) were evaluated for their cytogenetic effects in lymphocytes. Heparinized blood was mixed with culture medium RPMI-1640 supplemented with phytohemagglutinin, fetal calf serum, and antibiotics. Plastic tubes cont...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198611000-00006
更新日期:1986-11-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/RLI.0000000000000642
更新日期:2020-05-01 00:00:00
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journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-199206000-00012
更新日期:1992-06-01 00:00:00
abstract::Perfluoroctylbromide (PFOB), a radiopaque reticuloendothelial system contrast media for computed tomography, has been shown to accumulate in macrophages. In the current study PFOB was tested in rabbits as an abscess imaging agent. Two abscesses were induced in each of 24 rabbits, one in the liver and the other in the ...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-198409000-00017
更新日期:1984-09-01 00:00:00
abstract::Thirty patients [four normals, eight with mild and 18 with severe coronary artery disease (CAD)] were studied to evaluate left ventricular function type and post coronary angiography. The end diastolic volume (EDV), end systolic volume (ESV), ejection fraction (EF) and the regional contractility fractions (RCF) of eig...
journal_title:Investigative radiology
pub_type: 杂志文章
doi:10.1097/00004424-197603000-00009
更新日期:1976-03-01 00:00:00