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lung perfusion spect

Marc Meysman, Hendrik Everaert, Walter Vincken
AIM OF THE STUDY: The aim of the study was to analyze the evolution of perfusion (Q)-defects in patients treated for acute pulmonary embolism (PE), correlation with baseline parameters and evaluation of recurrence risk. METHODS: This is a single-center prospective observational cohort study in symptomatic normotensive PE. Comparison of the ventilation/perfusion single-photon emission computed tomography (V/Q-SPECT) acquired at baseline with a quantified SPECT (Q-SPECT) repeated at 1 week and 6 months...
January 2017: Annals of Thoracic Medicine
S Bowen, E Lee, R Miyaoka, J Saini, P Kinahan, G Sandison, T Wong, H Vesselle, R Rengan, J Zeng
PURPOSE: NSCLC patient RT is planned without consideration of spatial heterogeneity in lung function or tumor response, which may have contributed to failed uniform dose escalation in a randomized trial. The feasibility of functional lung avoidance and response-adaptive escalation (FLARE) RT to reduce dose to [(9 9m) Tc]MAA-SPECT/CT perfused lung while redistributing 74Gy within [(1 8) F]FDG-PET/CT biological target volumes was assessed. METHODS: Eight Stage IIB-IIIB NSCLC patients underwent FDG-PET/CT and MAA-SPECT/CT treatment planning scans...
June 2016: Medical Physics
Adam L Liss, Robin B Marsh, Nirav S Kapadia, Daniel L McShan, Virginia E Rogers, James M Balter, Jean M Moran, Kristy K Brock, Matt J Schipper, Reshma Jagsi, Kent A Griffith, Kevin R Flaherty, Kirk A Frey, Lori J Pierce
PURPOSE: To quantify lung perfusion changes after breast/chest wall radiation therapy (RT) using pre- and post-RT single photon emission computed tomography/computed tomography (SPECT/CT) attenuation-corrected perfusion scans; and correlate decreased perfusion with adjuvant RT dose for breast cancer in a prospective clinical trial. METHODS AND MATERIALS: As part of an institutional review board-approved trial studying the impact of RT technique on lung function in node-positive breast cancer, patients received breast/chest wall and regional nodal irradiation including superior internal mammary node RT to 50 to 52...
February 1, 2017: International Journal of Radiation Oncology, Biology, Physics
Milan Simanek, Pavel Koranda
Hybrid pulmonary imaging in the present day has seen a fusion of various uses of CT scans, including angiography (CTAG), diagnostic CT, low dose CT (LDCT), and perfusion or ventilation scintigraphy in tomographic or planar imaging. Determining the most effective individualized test for the complete diagnostics of patients with pulmonary symptoms for various groups of patients is a major issue. The aim of the present study was to assess the effectiveness of the implementation of hybrid imaging in current methods of nuclear medicine in differential diagnostics of pulmonary embolism (PE)...
2016: American Journal of Nuclear Medicine and Molecular Imaging
R H Ireland, B A Tahir, J M Wild, C E Lee, M Q Hatton
For patients with lung cancer undergoing curative intent radiotherapy, functional lung imaging can be incorporated into treatment planning to modify the dose distribution within non-target volume lung by differentiation of lung regions that are functionally defective or viable. This concept of functional image-guided lung avoidance treatment planning has been investigated with several imaging modalities, primarily single photon emission computed tomography (SPECT), but also hyperpolarised gas magnetic resonance (MR) imaging, positron emission tomography (PET) and computed tomography (CT)-based measures of lung biomechanics...
November 2016: Clinical Oncology: a Journal of the Royal College of Radiologists
Søren Hess, Poul Henning Madsen
Diagnostic imaging plays an integral role in the diagnostic workup of suspected pulmonary embolism, and several modalities have been employed over the years. In recent years, the choice has been narrowed to either computer tomographic or radionuclide based methods, i.e. computer tomographic angiography (CTA) and ventilation-perfusion scintigraphy (V/Q-scan). Both methods display advantages and shortcomings, and while we provide some insights into CTA and alternative methods, the paper's main focus is a review of the V/Q-scan...
September 13, 2016: Advances in Experimental Medicine and Biology
Dale L Bailey, Enid M Eslick, Geoffrey P Schembri, Paul J Roach
Gallium-68 ((68)Ga) is a positron-emitting radionuclide suitable for positron emission tomography (PET) imaging that has a number of convenient features-it has a physical half life of 68 minutes, it is generator produced at the PET facility and needs no local cyclotron, and being a radiometal is able to be chelated to a number of useful molecules for diagnostic imaging with PET. (68)Ga has recently been investigated as a radiotracer for ventilation and perfusion (V/Q) lung imaging. It is relatively easy to produce both V/Q radiopharmaceuticals labeled with (68)Ga for PET studies, it offers higher spatial resolution than equivalent SPECT studies, the short half life allows for multiple (repeated) scans on the same day, and low amounts of radiotracer can be used thus limiting the radiation dose to the subject...
September 2016: Seminars in Nuclear Medicine
Shawn Karls, Hani Hassoun, Vilma Derbekyan
A 67-year-old male presented with dyspnea for which lung scintigraphy was ordered to rule out pulmonary embolus. Planar images demonstrated abnormal midline uptake of Tc-99m macroaggregated albumin, which SPECT/CT localized to several thoracic vertebrae. Thoracic vertebral uptake on perfusion lung scintigraphy was previously described on planar imaging. Radionuclide venography and contrast-enhanced CT subsequently demonstrated superior vena cava (SVC) obstruction with collateralization through the azygous/hemiazygous system and vertebral venous plexus...
September 2016: Nuclear Medicine and Molecular Imaging
Yoshiharu Ohno, Hisanobu Koyama, Ho Yun Lee, Sachiko Miura, Takeshi Yoshikawa, Kazuro Sugimura
Assessment of regional pulmonary perfusion as well as nodule and tumor perfusions in various pulmonary diseases are currently performed by means of nuclear medicine studies requiring radioactive macroaggregates, dual-energy computed tomography (CT), and dynamic first-pass contrast-enhanced perfusion CT techniques and unenhanced and dynamic first-pass contrast enhanced perfusion magnetic resonance imaging (MRI), as well as time-resolved three-dimensional or four-dimensional contrast-enhanced magnetic resonance angiography (MRA)...
September 2016: Diagnostic and Interventional Radiology: Official Journal of the Turkish Society of Radiology
Kartik Dev Bhatia, Chaitanya Ambati, Rajiv Dhaliwal, Royce Paschkewitz, Eugene Hsu, Bao Ho, Andy Young, Louise Emmett
INTRODUCTION: Single Photon Emission Computed Tomography-Ventilation-Perfusion (SPECT-VQ) with low-dose CT (SPECT-CT/VQ) has equivalent diagnostic accuracy to CTPA for diagnosing pulmonary embolus (PE) while using lower radiation doses, but is underutilized owing to perceived inaccuracy of scintigraphy in the setting of pre-existing lung disease. This study assesses the accuracy of SPECT-CT/VQ compared with CTPA for the diagnosis of PE, including in patients with pre-existing lung disease...
August 2016: Journal of Medical Imaging and Radiation Oncology
Hiroaki Nomori, Yue Cong, Hiroshi Sugimura
OBJECTIVE: Segmentectomy includes numerous kinds of procedures that may result in decreased postoperative pulmonary function. This causes controversy regarding the functional advantage of segmentectomy over lobectomy. To clarify the difference between the procedures, systemic and regional pulmonary functions of the resected segments must be examined. METHODS: Pulmonary function tests and lung perfusion single-photon emission computed tomography (SPECT) were prospectively conducted before and after segmentectomy in 117 patients who were divided into groups based on resection of <2 segments (n = 83), ≥2 segments (n = 20), and left upper division (LUD) (n = 14)...
September 2016: Journal of Thoracic and Cardiovascular Surgery
James C Sanders, Philipp Ritt, Torsten Kuwert, A Hans Vija, Andreas K Maier
We propose a data-driven method for extracting a respiratory surrogate signal from SPECT list-mode data. The approach is based on dimensionality reduction with Laplacian Eigenmaps. By setting a scale parameter adaptively and adding a series of post-processing steps to correct polarity and normalization between projections, we enable fully-automatic operation and deliver a respiratory surrogate signal for the entire SPECT acquisition. We validated the method using 67 patient scans from three acquisition types (myocardial perfusion, liver shunt diagnostic, lung inhalation/perfusion) and an Anzai pressure belt as a gold standard...
June 7, 2016: IEEE Transactions on Medical Imaging
Yoshinori Nagamatsu, Susumu Sueyoshi, Hiroko Sasahara, Yousuke Oka, Hiroyuki Kumazoe, Masahiro Mitsuoka, Yoshito Akagi
OBJECTIVES: This study compared the prediction of postoperative exercise capacity by employing lung perfusion scintigraphy images obtained with single photon emission computed tomography together with computed tomography (SPECT/CT) versus the common method of counting subsegments (SC method). METHODS: In 18 patients scheduled for lobectomy, predicted postoperative maximum oxygen uptake per kilogram body weight ([Formula: see text]) was calculated by the SPECT/CT and SC methods...
September 2016: General Thoracic and Cardiovascular Surgery
Xavier Levac, François Harel, Vincent Finnerty, Quang T Nguyen, Myriam Letourneau, Sophie Marcil, Alain Fournier, Jocelyn Dupuis
BACKGROUND: Pulmonary perfusion is not spatially homogeneously distributed, and its variations could be of diagnostic value in lung vascular disease. PulmoBind is a ligand of the adrenomedullin receptor densely expressed in endothelial cells of lung capillaries. The aim of this study was to evaluate spatial distribution of human lung perfusion by using this novel molecular tracer of the pulmonary vascular endothelium. METHODS: Normal humans (n = 19) enrolled into the PulmoBind phase I trial were studied (Clinicaltrials...
December 2016: EJNMMI Research
Berardino De Bari, Letizia Deantonio, Jean Bourhis, John O Prior, Mahmut Ozsahin
PURPOSE: To report the available data about the potential impact of integrating lung perfusion SPECT/CT in treatment plans optimization for the irradiation of thoracic targets. MATERIALS AND METHODS: We searched in the PubMed and Scopus databases, English-written articles published from 2000 to June 2015 dealing with the integration of perfusion SPECT/CT in radiotherapy. RESULTS: We found and analyzed 16 research articles (10 dosimetric, 6 clinical) for a total of 578 patients...
June 2016: Critical Reviews in Oncology/hematology
C Dussault, E Gontier, C Verret, M Soret, A Boussuges, G Hedenstierna, S Montmerle-Borgdorff
Aeroatelectasis has developed in aircrew flying routine peacetime flights on the latest generation high-performance aircraft, when undergoing excessive oxygen supply. To single out the effects of hyperoxia and hypergravity on lung tissue compression, and on ventilation and perfusion, eight subjects were studied before and after 1 h 15 min exposure to +1 to +3.5 Gz in a human centrifuge. They performed the protocol three times, breathing air, 44.5% O2, or 100% O2 and underwent functional and topographical imaging of the whole lung by ultrasound and single-photon emission computed tomography combined with computed tomography (SPECT/CT)...
July 1, 2016: Journal of Applied Physiology
Susanne R Youngren-Ortiz, Nishant S Gandhi, Laura España-Serrano, Mahavir B Chougule
This article reviews the pulmonary route of administration, aerosol delivery devices, characterization of pulmonary drug delivery systems, and discusses the rationale for inhaled delivery of siRNA. Diseases with known protein malfunctions may be mitigated through the use of siRNA therapeutics. The inhalation route of administration provides local delivery of siRNA therapeutics for the treatment of various pulmonary diseases, however barriers to pulmonary delivery and intracellular delivery of siRNA exists. siRNA loaded nanocarriers can be used to overcome the barriers associated with the pulmonary route, such as anatomical barriers, mucociliary clearance, and alveolar macrophage clearance...
February 28, 2016: Kona: Powder Science and Technology in Japan
Meetha Medhora, Steven Haworth, Yu Liu, Jayashree Narayanan, Feng Gao, Ming Zhao, Said Audi, Elizabeth R Jacobs, Brian L Fish, Anne V Clough
UNLABELLED: Our goal is to develop minimally invasive biomarkers for predicting radiation-induced lung injury before symptoms develop. Currently, there are no biomarkers that can predict radiation pneumonitis. Radiation damage to the whole lung is a serious risk in nuclear accidents or in radiologic terrorism. Our previous studies have shown that a single dose of 15 Gy of x-rays to the thorax causes severe pneumonitis in rats by 6-8 wk. We have also developed a mitigator for radiation pneumonitis and fibrosis that can be started as late as 5 wk after radiation...
August 2016: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
Ewa Witkowska-Patena, Andrzej Mazurek, Mirosław Dziuk
A 29-year-old patient after blunt chest trauma with right lung atelectasis and pulmonary empyema was referred for lung ventilation and perfusion scintigraphy before right-sided pneumonectomy. Radionuclide imaging revealed severely reduced perfusion and lack of ventilation in the collapsed right lung. Additionally, it showed a matching lobar perfusion-ventilation defect in the lower left lobe, which, apart from consolidation area in posterior basal segment, appeared normal in computed tomography. A normal perfusion and ventilation pattern was observed in the upper left lobe...
2016: Nuclear Medicine Review. Central & Eastern Europe
S Ibáñez-Bravo, I Banzo, R Quirce, I Martínez-Rodríguez, J Jiménez-Bonilla, N Martínez-Amador, J A Parra, J González-Macías, J M Carril
UNLABELLED: The aim was to compare ventilation/perfusion SPECT lung scintigraphy (V/Q-SPECT) and computed tomography pulmonary angiography (CTPA) in patients with suspicion of pulmonary embolism (PE). MATERIAL AND METHODS: This prospectively designed study included 53 patients with intermediate or high clinical probability of PE. A V/Q-SPECT and CTPA was performed on all patients. The V/Q-SPECT was interpreted according to the European Association of Nuclear Medicine and Molecular Imaging (EANMMI) guidelines...
July 2016: Revista Española de Medicina Nuclear e Imagen Molecular
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