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Gear J, Chiesa C, Lassmann M, Gabiña PM, Tran-Gia J, Stokke C, Flux G. EANM Dosimetry Committee series on standard operational procedures for internal dosimetry for 131I mIBG treatment of neuroendocrine tumours. EJNMMI Phys 2020; 7:15. [PMID: 32144574 PMCID: PMC7060302 DOI: 10.1186/s40658-020-0282-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 02/13/2020] [Indexed: 11/23/2022] Open
Abstract
The purpose of the EANM Dosimetry Committee Series on "Standard Operational Procedures for Dosimetry" (SOP) is to provide advice to scientists and clinicians on how to perform patient-specific absorbed dose assessments. This SOP describes image and data acquisition parameters and dosimetry calculations to determine the absorbed doses delivered to whole-body, tumour and normal organs following a therapeutic administration of 131I mIBG for the treatment of neuroblastoma or adult neuroendocrine tumours. Recommendations are based on evidence in recent literature where available and on expert opinion within the community. This SOP is intended to promote standardisation of practice within the community and as such is based on the facilities and expertise that should be available to any centre able to perform specialised treatments with radiopharmaceuticals and patient-specific dosimetry. A clinical example is given to demonstrate the application of the absorbed dose calculations.
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Affiliation(s)
- Jonathan Gear
- Joint Department of Physics, Royal Marsden Hospital & Institute of Cancer Research, Sutton, UK.
| | - Carlo Chiesa
- Nuclear Medicine, Foundation IRCCS Istituto Nazionale Tumori, Milan, Italy
| | - Michael Lassmann
- Department of Nuclear Medicine, University of Würzburg, 97080, Würzburg, Germany
| | - Pablo Mínguez Gabiña
- Department of Medical Physics and Radiation Protection, Gurutzeta/Cruces University Hospital, Barakaldo, Spain
| | - Johannes Tran-Gia
- Department of Nuclear Medicine, University of Würzburg, 97080, Würzburg, Germany
| | - Caroline Stokke
- Department of Diagnostic Physics, Division of Radiology and Nuclear Medicine, Oslo University Hospital, Oslo, Norway
| | - Glenn Flux
- Joint Department of Physics, Royal Marsden Hospital & Institute of Cancer Research, Sutton, UK
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Tadesse GF, Geramifar P, Tegaw EM, Ay MR. Techniques for generating attenuation map using cardiac SPECT emission data only: a systematic review. Ann Nucl Med 2018; 33:1-13. [DOI: 10.1007/s12149-018-1311-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 10/10/2018] [Indexed: 10/28/2022]
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Padmanabhan P, Nedumaran AM, Mishra S, Pandarinathan G, Archunan G, Gulyás B. The Advents of Hybrid Imaging Modalities: A New Era in Neuroimaging Applications. ACTA ACUST UNITED AC 2017; 1:e1700019. [PMID: 32646180 DOI: 10.1002/adbi.201700019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 03/30/2017] [Indexed: 01/29/2023]
Abstract
Hybrid Imaging modalities have shown great potential in medical imaging and diagnosis. A more comprehensive and targeted view of neurological disorders can be achieved by blending the anatomical and functional perspectives through hybridization. With consistently improving technologies, there have been many developments in fused imaging techniques over the past few decades. This article provides an overview of various bimodal and trimodal hybrid imaging techniques being developed and explored for neuroimaging applications. Recent advancements and potentials are discussed for single photon emission computed tomography-computed tomography (SPECT-CT), positron emission tomography-CT (PET-CT), PET-magnetic resonance imaging (PET-MRI), electroencephalography-functional magnetic resonance imaging (EEG-fMRI), magnetoencephalography-fMRI (MEG-fMRI), EEG-near-infrared spectroscopy (EEG-NIRS), magnetic resonance-PET-EEG (MR-PET-EEG) and MR-PET-CT in the perspective of neuroimaging. A comparison of these hybrid approaches is provided on a single platform to analyze their performance on the basis of several common factors essential for imaging and analyzing neurological disorders and in vivo molecular processes. This article also provides an overview of recently developed advanced imaging technologies that are being hybridized with other imaging modalities and being explored as potential techniques for neuroscience. Novel approaches and clinical applications of hybrid neuroimaging are anticipated with inclusion of new technologies, better sensing capabilities, multimodal probes, and improved hybridization.
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Affiliation(s)
- Parasuraman Padmanabhan
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, 636921, Singapore
| | - Anu Maashaa Nedumaran
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, 636921, Singapore.,Department of Biomedical Engineering, SRM University, SRM Nagar, Kattankulathur, Kanchipuram, Tamil Nadu, 603203, India
| | - Sachin Mishra
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, 636921, Singapore
| | - Ganesh Pandarinathan
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, 636921, Singapore.,Department of Biomedical Engineering, SRM University, SRM Nagar, Kattankulathur, Kanchipuram, Tamil Nadu, 603203, India
| | - Govindaraju Archunan
- Centre for Pheromone Technology, Department of Animal Science, Bharathidasan University, Tiruchirappalli, 620024, India
| | - Balázs Gulyás
- Lee Kong Chian School of Medicine, Nanyang Technological University, 59 Nanyang Drive, 636921, Singapore
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JOURNAL CLUB: CT Dose Optimization for Whole-Body PET/CT Examinations. AJR Am J Roentgenol 2013; 201:257-63. [DOI: 10.2214/ajr.12.10495] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Jha AK, Clarkson E, Kupinski MA, Barrett HH. Joint reconstruction of activity and attenuation map using LM SPECT emission data. PROCEEDINGS OF SPIE--THE INTERNATIONAL SOCIETY FOR OPTICAL ENGINEERING 2013; 8668. [PMID: 26236067 DOI: 10.1117/12.2008111] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Attenuation and scatter correction in single photon emission computed tomography (SPECT) imaging often requires a computed tomography (CT) scan to compute the attenuation map of the patient. This results in increased radiation dose for the patient, and also has other disadvantages such as increased costs and hardware complexity. Attenuation in SPECT is a direct consequence of Compton scattering, and therefore, if the scattered photon data can give information about the attenuation map, then the CT scan may not be required. In this paper, we investigate the possibility of joint reconstruction of the activity and attenuation map using list-mode (LM) SPECT emission data, including the scattered-photon data. We propose a path-based formalism to process scattered-photon data. Following this, we derive analytic expressions to compute the Cramér-Rao bound (CRB) of the activity and attenuation map estimates, using which, we can explore the fundamental limit of information-retrieval capacity from LM SPECT emission data. We then suggest a maximum-likelihood (ML) scheme that uses the LM emission data to jointly reconstruct the activity and attenuation map. We also propose an expectation-maximization (EM) algorithm to compute the ML solution.
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Affiliation(s)
- Abhinav K Jha
- College of Optical Sciences, University of Arizona, Tucson, AZ, USA
| | - Eric Clarkson
- College of Optical Sciences, University of Arizona, Tucson, AZ, USA ; Department of Medical Imaging, University of Arizona, Tucson, AZ, USA
| | - Matthew A Kupinski
- College of Optical Sciences, University of Arizona, Tucson, AZ, USA ; Department of Medical Imaging, University of Arizona, Tucson, AZ, USA
| | - Harrison H Barrett
- College of Optical Sciences, University of Arizona, Tucson, AZ, USA ; Department of Medical Imaging, University of Arizona, Tucson, AZ, USA
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Fahey FH, Treves ST, Adelstein SJ. Minimizing and communicating radiation risk in pediatric nuclear medicine. J Nucl Med Technol 2012; 40:13-24. [PMID: 22393223 DOI: 10.2967/jnumed.109.069609] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The value of pediatric nuclear medicine is well established. Pediatric patients are referred to nuclear medicine from nearly all pediatric specialties including urology, oncology, cardiology, gastroenterology, and orthopedics. Radiation exposure is associated with a potential, small, risk of inducing cancer in the patient later in life and is higher in younger patients. Recently, there has been enhanced interest in exposure to radiation from medical imaging. Thus, it is incumbent on practitioners of pediatric nuclear medicine to have an understanding of dosimetry and radiation risk to communicate effectively with their patients and their families. This article reviews radiation dosimetry for radiopharmaceuticals and also CT given the recent proliferation of PET/CT and SPECT/CT. It also describes the scientific basis for radiation risk estimation in the context of pediatric nuclear medicine. Approaches for effective communication of risk to patients' families are discussed. Lastly, radiation dose reduction in pediatric nuclear medicine is explicated.
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Affiliation(s)
- Frederic H Fahey
- Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Children's Hospital Boston, Boston, Massachusetts 02115, USA.
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Bento J, Teles P, Neves M, Santos AI, Cardoso G, Barreto A, Alves F, Guerreiro C, Rodrigues A, Santos JAM, Capelo C, Parafita R, Martins B. Study of nuclear medicine practices in Portugal from an internal dosimetry perspective. RADIATION PROTECTION DOSIMETRY 2012; 149:438-443. [PMID: 21795254 DOI: 10.1093/rpd/ncr319] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Nuclear medicine practices involve the handling of a wide range of pharmaceuticals labelled with different radionuclides, for diagnostic and therapeutic purposes. This work intends to evaluate the potential risks of internal contamination of nuclear medicine staff in several Portuguese nuclear medicine services and to conclude about the requirement of a routine internal monitoring. A methodology proposed by the International Atomic Energy Agency (IAEA), providing a set of criteria to determine the need, or not, for an internal monitoring programme, was applied. The evaluation of the risk of internal contaminations in a given set of working conditions is based on the type and amount of radionuclides being handled, as well as the safety conditions with which they are manipulated. The application of the IAEA criteria showed that 73.1% of all the workers included in this study should be integrated in a routine monitoring programme for internal contaminations; more specifically, 100% of workers performing radioimmunoassay techniques should be monitored. This study suggests that a routine monitoring programme for internal exposures should be implemented in Portugal for most nuclear medicine workers.
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Affiliation(s)
- J Bento
- Instituto Tecnológico e Nuclear, Sacavém, Portugal.
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