Affiliation: Kitasato University
- Validation of novel calibration scheme with traceable point-like (22)Na sources on six types of PET scannersTomoyuki Hasegawa
Allied Health Sciences, Kitasato University, Kitasato 1 15 1, Minami Ku, Sagamihara, Kanagawa, 252 0373, Japan
Ann Nucl Med 27:346-54. 2013..275-MeV γ rays accompanying β (+) decays. The purpose of this study is to validate this new calibration scheme with traceable point-like (22)Na sources on various types of PET scanners...
- Microfocus x-ray imaging of traceable pointlike (22)Na sources for quality controlT Hasegawa
Allied Health Sciences, Kitasato University, Kanagawa, Japan
Med Phys 39:4414-22. 2012....
- Semi-quantitative and simulation analyses of effects of γ rays on determination of calibration factors of PET scanners with point-like (22)Na sourcesTomoyuki Hasegawa
School of Allied Health Sciences, Kitasato University, 1 15 1, Kitasato, Minamiku, Sagamihara, Kanagawa, 252 0373, Japan
Phys Med Biol 56:6031-45. 2011..This study thus offers an important theoretical basis for the validity of the calibration method using point-like (22)Na radioactive sources...
- Creation and application of three-dimensional computer-graphic animations for introduction to radiological physics and technologyTomoyuki Hasegawa
Graduate School of Medical Science, Kitasato University, Sagamihara, Kanagawa, Japan
Radiol Phys Technol 3:1-9. 2010..Opinion surveys conducted in undergraduate courses at Kitasato University support the effectiveness of our educational tools in helping students gain a better understanding of the subjects offered and in raising their interest...
- A practical method of determining cross-calibration factors of PET scanners by moving a point-like (22)Na radioactive sourceTomoyuki Hasegawa
School of Allied Health Sciences, Kitasato University, 1 15 1 Kitasato, Sagamihara, Kanagawa, Japan
Ann Nucl Med 24:655-61. 2010..This paper describes a new practical method that uses a point-like (22)Na radioactive source for determining CCFs...
- Point-like radioactive source with multiple absorber capsules for evaluating PET scannersTomoyuki Hasegawa
School of Allied Health Sciences, Kitasato University, 1 15 1 Kitasato, Sagamihara, Kanagawa, 228 8555, Japan
Ann Nucl Med 24:427-32. 2010..The aim of this study is to propose a point-like radioactive source with multiple absorber capsules, for which evaluation can be independent of scatter and attenuation owing to the source absorbers...
- Optical observation of energy loss distribution and practical range of positrons from a 18F water solution in a water-equivalent phantomTomoyuki Hasegawa
Allied Health Sciences, Kitasato University, Kitasato 1 15 1, Sagamihara, Kanagawa 228 8555, Japan
Med Phys 36:402-10. 2009....
- Evaluation of static physics performance of the jPET-D4 by Monte Carlo simulationsTomoyuki Hasegawa
Allied Health Sciences, Kitasato University, Kitasato 1 15 1, Sagamihara, Kanagawa, 228 8555, Japan
Phys Med Biol 52:213-30. 2007..The results we describe here are essential to take full advantage of the next generation PET systems that have DOI recognition capability...
- On-clock non-paralyzable count-loss modelTomoyuki Hasegawa
Allied Health Sciences, Kitasato University, Sagamihara shi, Kanagawa Ken, 228 8555, Japan
Phys Med Biol 49:547-55. 2004..This model was found to be a better fit to a data-acquisition system for a positron emission tomography scanner...
- Shielding effects of body - shields for 3D PETTomoyuki Hasegawa
Kitasato University, Allied Health Sciences
Igaku Butsuri 22:318-26. 2002..The body-shield should be carefully designed to minimize the gap between the body-shield and radioactive distribution as much as possible to maximize the shielding effects, and to be applicable to clinical diagnoses...
- [Correction of respiratory movement using ultrasound for cardiac nuclear medicine examinations: fundamental study using an X-ray TV machine]Kazushige Yoda
Radiological Technology Course, Department of Medical Engineering and Technology, School of Allied Health Sciences, Kitasato University
Nihon Hoshasen Gijutsu Gakkai Zasshi 59:1399-406. 2003..As a result, respiratory movements of about 20.1 mm were successfully reduced to less than 2.6 mm. We conclude that this correction technique is potentially useful in nuclear medicine cardiology...
- Transaxial system models for jPET-D4 image reconstructionTaiga Yamaya
National Institute of Radiological Sciences, 4 9 1 Anagawa, Inage Ku, Chiba 263 8555, Japan
Phys Med Biol 50:5339-55. 2005..A 3D image reconstruction with the on-the-fly calculation of the system matrix is within the practical limitations by incorporating the proposed model and the DOIC method with one-pass accelerated iterative methods...