Abstract:
PURPOSE:Our group has previously reported on the use of (68)Ga-ventilation/perfusion (VQ) PET/CT scanning for the diagnosis of pulmonary embolism. We describe here the acquisition methodology for (68)Ga-VQ respiratory gated (4-D) PET/CT and the effects of respiratory motion on image coregistration in VQ scanning. METHODS:A prospective study was performed in 15 patients with non-small-cell lung cancer. 4-D PET and 4-D CT images were acquired using an infrared marker on the patient's abdomen as a surrogate for breathing motion following inhalation of Galligas and intravenous administration of (68)Ga-macroaggregated albumin. Images were reconstructed with phase-matched attenuation correction. The lungs were contoured on CT and PET VQ images during free-breathing (FB) and at maximum inspiration (Insp) and expiration (Exp). The similarity between PET and CT volumes was measured using the Dice coefficient (DC) comparing the following groups; (1) FB-PET/CT, (2) InspPET/InspCT, (3) ExpPET/Exp CT, and (4) FB-PET/AveCT. A repeated measures one-way ANOVA with multiple comparison Tukey tests were performed to evaluate any difference between the groups. Diaphragmatic motion in the superior-inferior direction on the 4-D CT scan was also measured. RESULTS:4-D VQ scanning was successful in all patients without additional acquisition time compared to the nongated technique. The highest volume overlap was between ExpPET and ExpCT and between FB-PET and AveCT with a DC of 0.82 and 0.80 for ventilation and perfusion, respectively. This was significantly better than the DC comparing the other groups (0.78-0.79, p < 0.05). These values agreed with a visual inspection of the images with improved image coregistration around the lung bases. The diaphragmatic motion during the 4-D CT scan was highly variable with a range of 0.4-3.4 cm (SD 0.81 cm) in the right lung and 0-2.8 cm (SD 0.83 cm) in the left lung. Right-sided diaphragmatic nerve palsy was observed in 3 of 15 patients. CONCLUSION:(68)Ga-VQ 4-D PET/CT is feasible and the blurring caused by respiratory motion is well corrected with 4-D acquisition, which principally reduces artefact at the lung bases. The images with the highest spatial overlap were the combined expiration phase or FB PET and average CT. With higher resolution than SPECT/CT, the PET/CT technique has a broad range of potential clinical applications including diagnostic algorithms for patients with suspected pulmonary embolism, preoperative evaluation of regional lung function and improving assessment or understanding of pulmonary physiology in the vast range of pulmonary diseases.
journal_name
Eur J Nucl Med Mol Imagingauthors
Callahan J,Hofman MS,Siva S,Kron T,Schneider ME,Binns D,Eu P,Hicks RJdoi
10.1007/s00259-013-2607-4subject
Has Abstractpub_date
2014-02-01 00:00:00pages
343-9issue
2eissn
1619-7070issn
1619-7089journal_volume
41pub_type
杂志文章abstract::In locally advanced head and neck squamous cell carcinoma (HNSCC), the role of imaging becomes more and more critical in the management process. In this framework, molecular imaging techniques such as PET allow noninvasive assessment of a range of tumour biomarkers such as metabolism, hypoxia and proliferation, which ...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,评审
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abstract:PURPOSE:In the era of precision medicine, patient-specific dose calculation using Monte Carlo (MC) simulations is deemed the gold standard technique for risk-benefit analysis of radiation hazards and correlation with patient outcome. Hence, we propose a novel method to perform whole-body personalized organ-level dosime...
journal_title:European journal of nuclear medicine and molecular imaging
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abstract:PURPOSE:Functional activation protocols are widely applied for the study of brain-cognition relations. Only few take advantage of the intrinsic characteristics of SPECT, particularly those allowing cognitive assessment outside of the camera, in settings close to the standard clinical or laboratory ones. The purpose of ...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-007-0635-7
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abstract:PURPOSE:PET imaging has been recently introduced for investigating the type 1 angiotensin II receptor (AT(1)R) in vivo. The goal of the present study was to investigate the effects of acute and chronic exposure to angiotensin converting enzyme inhibitors (ACEI) on the AT(1)R in the dog kidney. METHODS:Animals were ima...
journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
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journal_title:European journal of nuclear medicine and molecular imaging
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abstract:PURPOSE:Alzheimer's disease (AD) is a primary degenerative disease that progressively affects all brain functions, with devastating consequences for the patient, the patient's family and society. Rest regional cerebral blood flow (rCBF) could have a strategic role in differentiating between AD patients and normal contr...
journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,评审
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 共识发展会议,指南,杂志文章,实务指引,评审
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-007-0601-4
更新日期:2008-03-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 临床试验,杂志文章
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-017-3844-8
更新日期:2018-03-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-017-3718-0
更新日期:2017-09-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
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更新日期:2002-05-01 00:00:00
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journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-010-1524-z
更新日期:2010-11-01 00:00:00
abstract:BACKGROUND:The aim of this study was to assess radiomics features on pre-treatment [18F]FDG positron emission tomography (PET) as potential biomarkers for response and survival in patients with metastatic colorectal cancer (mCRC). METHODS:Patients with mCRC underwent [18F]FDG PET/computed tomography (CT) prior to firs...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
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更新日期:2018-12-01 00:00:00
abstract::The introduction of multislice computed tomography (MSCT) has allowed non-invasive coronary angiography. Although widely applied, extensive information on technical details of the technique is lacking. This survey offers detailed information on patient preparation, data acquisition, reconstruction and interpretation. ...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章,评审
doi:10.1007/s00259-005-1856-2
更新日期:2005-11-01 00:00:00
abstract:PURPOSE:To assess the relationship between serum thyroglobulin (Tg) levels, Tg doubling time (Tg-DT) and the diagnostic performance of (18)F-FDG PET/CT in detecting recurrences of (131)I-negative differentiated thyroid carcinoma (DTC). METHODS:Included in the present study were 102 patients with DTC. All patients were...
journal_title:European journal of nuclear medicine and molecular imaging
pub_type: 杂志文章
doi:10.1007/s00259-013-2370-6
更新日期:2013-06-01 00:00:00