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Kinoshita M, Arita H, Goto T, Okita Y, Isohashi K, Watabe T, Kagawa N, Fujimoto Y, Kishima H, Shimosegawa E, Hatazawa J, Hashimoto N, Yoshimine T. A Novel PET Index, 18F-FDG–11C-Methionine Uptake Decoupling Score, Reflects Glioma Cell Infiltration. J Nucl Med 2012; 53:1701-8. [DOI: 10.2967/jnumed.112.104992] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Kato H, Shimosegawa E, Isohashi K, Kimura N, Kazui H, Hatazawa J. Distribution of cortical benzodiazepine receptor binding in right-handed healthy humans: a voxel-based statistical analysis of iodine 123 iomazenil SPECT with partial volume correction. AJNR Am J Neuroradiol 2012; 33:1458-63. [PMID: 22403779 DOI: 10.3174/ajnr.a3005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE CBR imaging is highly susceptible to a PVE produced by morphologic changes in the brain related to aging and brain laterality. We assessed the influence of PVE produced by regional age-related changes in gray matter volume on I-123 iomazenil SPECT and elucidated the age-related changes in human CBR binding by using PVE-corrected SPECT images. MATERIALS AND METHODS Nineteen right-handed healthy volunteers (range, 25-82 years; mean, 55 ± 21 years) underwent MR imaging and quantitative I-123 iomazenil SPECT imaging. The influence of age-related changes in rGMC on SPECT images before PVE correction was assessed. PVE correction of the SPECT images was performed by using an MR imaging-based method. Voxel-based linear regression analyses of the PVE-corrected SPECT images were performed by using SPM5. RESULTS The age-related reductions in rGMC and BP without PVE correction revealed a significant direct proportional correlation. Voxel-based statistical analysis with PVE correction showed no significant age-related changes in BP. CONCLUSIONS PVE correction was indispensable for the analysis of I-123 iomazenil SPECT images. PVE-corrected quantitative I-123 iomazenil SPECT images revealed no age-related changes in CBR binding in right-handed healthy humans.
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Nomura K, Kazui H, Wada T, Sugiyama H, Yamamoto D, Yoshiyama K, Shimosegawa E, Hatazawa J, Takeda M. Classification of delusions in Alzheimer's disease and their neural correlates. Psychogeriatrics 2012; 12:200-10. [PMID: 22994619 DOI: 10.1111/j.1479-8301.2012.00427.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Previous findings on neural correlates of delusion in Alzheimer's disease (AD) have been inconsistent because of methodological issues, such as treating multiple delusions as a single entity. In this retrospective study, we classified AD delusions and investigated their neural correlates by using single-photon emission computed tomography data. METHODS We selected AD patients with delusions from our consecutive outpatients from 2004 to 2010. In this study, eight types of delusions were evaluated with Neuropsychiatric Inventory and classified by factor analysis. Twenty-five of the patients also had single-photon emission computed tomography data, which we used to assess the relationships between cerebral regions of hypoperfusion and hyperperfusion and each classified delusion. The relations were assessed using Statistical Parametric Mapping with normalization to the white matter cerebral blood flow. RESULTS The delusions were classified into three factors. Factor 1 consisted of a belief that his/her house is not his/her home, phantom boarder symptom, delusion of abandonment, and belief that one's spouse or others are not who they claim to be. Factor 1 was related to hypoperfusion in the right temporal pole and hyperperfusion in the medial frontal and precentral regions. Factor 2 consisted of delusion relating to the television and delusion of persecution. Factor 2 was related to hypoperfusion in the precuneus and hyperperfusion in the insula and thalamus. Factor 3 consisted of delusion of abandonment and delusional jealousy. Factor 3 was related to hypoperfusion in the right inferior temporal and frontal regions and hyperperfusion in the middle frontal gyrus, insula and posterior cingulate gyrus. Delusion of theft was not included in any factors, and it was related to hypoperfusion in the bilateral thalami and left posterior cingulate gyrus and hyperperfusion in the left inferior frontal regions and anterior cingulate gyrus. CONCLUSIONS Delusions in AD were classifiable, and each classified delusion was related to different neural networks.
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Koshino K, Watabe H, Enmi J, Hirano Y, Zeniya T, Hasegawa S, Hayashi T, Miyagawa S, Sawa Y, Hatazawa J, Iida H. Effects of patient movement on measurements of myocardial blood flow and viability in resting ¹⁵O-water PET studies. J Nucl Cardiol 2012; 19:524-33. [PMID: 22314554 PMCID: PMC3358554 DOI: 10.1007/s12350-012-9522-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Accepted: 01/12/2012] [Indexed: 11/26/2022]
Abstract
BACKGROUND Patient movement has been considered an important source of errors in cardiac PET. This study was aimed at evaluating the effects of such movement on myocardial blood flow (MBF) and perfusable tissue fraction (PTF) measurements in intravenous ¹⁵O-water PET. METHODS Nineteen ¹⁵O-water scans were performed on ten healthy volunteers and three patients with severe cardiac dysfunction under resting conditions. Motions of subjects during scans were estimated by monitoring locations of markers on their chests using an optical motion-tracking device. Each sinogram of the dynamic emission frames was corrected for subject motion. Variation of regional MBF and PTF with and without the motion corrections was evaluated. RESULTS In nine scans, motions during ¹⁵O-water scan (inter-frame (IF) motion) and misalignments relative to the transmission scan (inter-scan (IS) motion) larger than the spatial resolution of the PET scanner (4.0 mm) were both detected by the optical motion-tracking device. After correction for IF motions, MBF values changed from 0.845 ± 0.366 to 0.780 ± 0.360 mL/minute/g (P < .05). In four scans with only IS motion detected, PTF values changed significantly from 0.465 ± 0.118 to 0.504 ± 0.087 g/mL (P< .05), but no significant change was found in MBF values. CONCLUSIONS This study demonstrates that IF motion during ¹⁵O-water scan at rest can be source of error in MBF measurement. Furthermore, estimated MBF is less sensitive than PTF values to misalignment between transmission and ¹⁵O-water emission scans.
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Kato H, Matsuda K, Baba K, Shimosegawa E, Isohashi K, Imaizumi M, Hatazawa J. MR imaging-based correction for partial volume effect improves detectability of intractable epileptogenic foci on iodine 123 iomazenil brain SPECT images: an extended study with a larger sample size. AJNR Am J Neuroradiol 2012; 33:2088-94. [PMID: 22627794 DOI: 10.3174/ajnr.a3121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE It has been suggested, on the basis of a previous pilot study conducted in a small number of patients, that MR imaging-based PVE correction in I-123 iomazenil brain SPECT improves the detectability of cortical epileptogenic foci. In the present study, we performed an investigation by using a larger sample size to establish the effectiveness of the PVE correction and to conduct a detailed evaluation based on the histologic classification of lesions. MATERIALS AND METHODS Seventy-five patients (male/female, 37/38; age, 28 ± 12 years) with intractable epilepsy who had undergone surgical treatment were enrolled in this study. I-123 iomazenil SPECT and MR imaging examinations were performed before the operation in all patients. I-123 iomazenil SPECT images with and without MR imaging-based PVE correction were assessed visually and by semiquantitative analysis based on the AI(%) of the SPECT count in the resected lesions. RESULTS The sensitivity, specificity, and accuracy of foci detection by visual assessment were significantly higher after PVE correction compared with the values obtained before the correction. The results of the semiquantitative analysis revealed that the asymmetry of the SPECT counts was significantly increased after the PVE correction in the surgically resected lesions in cases of mesial temporal sclerosis, tumor, and malformations of cortical development. CONCLUSIONS The effectiveness of MR imaging-based PVE correction in I-123 iomazenil brain SPECT in improving the detection of cortical epileptogenic foci with abnormal histologic findings was established by our investigation conducted on a large sample size.
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Yanagawa M, Tatsumi M, Miyata H, Morii E, Tomiyama N, Watabe T, Isohashi K, Kato H, Shimosegawa E, Yamasaki M, Mori M, Doki Y, Hatazawa J. Evaluation of response to neoadjuvant chemotherapy for esophageal cancer: PET response criteria in solid tumors versus response evaluation criteria in solid tumors. J Nucl Med 2012; 53:872-80. [PMID: 22582049 DOI: 10.2967/jnumed.111.098699] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
UNLABELLED Recently, PET response criteria in solid tumors (PERCIST) have been proposed as a new standardized method to assess chemotherapeutic response metabolically and quantitatively. The aim of this study was to evaluate therapeutic response to neoadjuvant chemotherapy for locally advanced esophageal cancer, comparing PERCIST with the currently widely used response evaluation criteria in solid tumors (RECIST). METHODS Fifty-one patients with locally advanced esophageal cancer who received neoadjuvant chemotherapy (5-fluorouracil, adriamycin, and cisplatin), followed by surgery were studied. Chemotherapeutic lesion responses were evaluated using (18)F-FDG PET and CT according to the RECIST and PERCIST methods. The PET/CT scans were obtained before chemotherapy and about 2 wk after completion of chemotherapy. Associations were statistically analyzed between survival (overall and disease-free survival) and clinicopathologic results (histology [well-, moderately, and poorly differentiated squamous cell carcinoma], lymphatic invasion, venous invasion, clinical stage, pathologic stage, resection level, reduction rate of tumor diameter, reduction rate of tumor uptake, chemotherapeutic responses in RECIST and PERCIST, and pathologic response). RESULTS There was a significant difference in response classification between RECIST and PERCIST (Wilcoxon signed-rank test, P < 0.0001). Univariate analysis showed that lymphatic invasion, venous invasion, resection level, pathologic stage, and PERCIST were significant factors associated with disease-free or overall survival in this study. Although multivariate analysis demonstrated that venous invasion (disease-free survival: hazard ratio [HR] = 4.519, P = 0.002; overall survival: HR = 5.591, P = 0.003) and resection level (disease-free survival: HR = 11.078, P = 0.001) were the significant predictors, PERCIST was also significant in noninvasive therapy response assessment before surgery (disease-free survival: HR = 4.060, P = 0.025; overall survival: HR = 8.953, P = 0.034). CONCLUSION RECIST based on the anatomic size reduction rate did not demonstrate the correlation between therapeutic responses and prognosis in patients with esophageal cancer receiving neoadjuvant chemotherapy. However, PERCIST was found to be the strongest independent predictor of outcomes. Given the significance of noninvasive radiologic imaging in formulating clinical treatment strategies, PERCIST might be considered more suitable for evaluation of chemotherapeutic response to esophageal cancer than RECIST.
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Chiba Y, Kinoshita M, Okita Y, Tsuboi A, Isohashi K, Kagawa N, Fujimoto Y, Oji Y, Oka Y, Shimosegawa E, Morita S, Hatazawa J, Sugiyama H, Hashimoto N, Yoshimine T. Use of 11C-methionine PET parametric response map for monitoring WT1 immunotherapy response in recurrent malignant glioma. J Neurosurg 2012; 116:835-42. [DOI: 10.3171/2011.12.jns111255] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Object
Immunotherapy targeting the Wilms tumor 1 (WT1) gene product is a promising treatment modality for patients with malignant gliomas, and there have been reports of encouraging results. It has become clear, however, that Gd-enhanced MR imaging does not reflect prognosis, thereby necessitating a more robust imaging evaluation system for monitoring response to WT1 immunotherapy. To meet this demand, the authors performed a voxel-wise parametric response map (PRM) analysis of 11C-methionine PET (MET-PET) in WT1 immunotherapy and compared the data with the overall survival after initiation of WT1 immunotherapy (OSWT1).
Methods
Fourteen patients with recurrent malignant glioma were included in the study, and OSWT1 was compared with: 1) volume and length change in the contrast area of the tumor on Gd-enhanced MR images; 2) change in maximum uptake of 11C-methionine; and 3) a more detailed voxel-wise PRM analysis of MET-PET pre- and post-WT1 immunotherapy.
Results
The PRM analysis was able to identify the following 3 areas within the tumor core: 1) area with no change in 11C-methionine uptake pre- and posttreatment; 2) area with increased 11C-methionine uptake posttreatment (PRM+MET); and 3) area with decreased 11C-methionine uptake posttreatment. While the results of Gd-enhanced MR imaging volumetric and conventional MET-PET analysis did not correlate with OSWT1 (p = 0.270 for Gd-enhanced MR imaging length, p = 0.960 for Gd-enhanced MR imaging volume, and p = 0.110 for MET-PET), the percentage of PRM+MET area showed excellent correlation (p = 0.008) with OSWT1.
Conclusions
This study describes the limited value of Gd-enhanced MR imaging and highlights the potential of voxel-wise PRM analysis of MET-PET for monitoring treatment response in immunotherapy for malignant gliomas. Clinical trial registration no.: UMIN000002001.
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Iida H, Nakagawara J, Hatazawa J, Suzuki M, Takahashi M, Shimosegawa E, Shirao T, Murakami S, Fukuda K. [Estimation of the arterial blood radioactivity concentration using the whole body-to-arterial blood partition coefficients and the cross-calibration factor in 123I-iodoamphetamine SPECT--towards a noninvasive clinical protocol with the QSPECT-DTARG method]. KAKU IGAKU. THE JAPANESE JOURNAL OF NUCLEAR MEDICINE 2012; 49:49-58. [PMID: 22779347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The aim of this study is to develop a non-invasive procedure for quantitative assessment of regional cerebral blood flow using IMP and SPECT. A technique to utilize a population-based standardized arterial input function has been evaluated for the normal data base obtained from 3 institutions, which employed different SPECT device configurations. In total, data from 39 subjects were analyzed. Due to the unique feature of the QSPECT reconstruction software program, images are quantitative providing units of Bq/ml. Thus, the well counter values can be converted to absolute radioactivity concentration. The blood-to-whole-body average partition coefficient was 343.8 +/- 65.0 and did not show significant difference among the three institutions. The estimated blood counts agreed with those assessed by the well counter in all institutions, thus the arterial input function can be estimated with the unique conversion factor for all institutions. This feature may allow a large scale multi-center investigation, which may contribute to improve the non-invasive protocol.
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Tatsumi M, Yamamoto S, Imaizumi M, Watabe T, Kanai Y, Aoki M, Kato H, Shimosegawa E, Hatazawa J. Simultaneous PET/MR body imaging in rats: initial experiences with an integrated PET/MRI scanner. Ann Nucl Med 2012; 26:444-9. [PMID: 22359223 DOI: 10.1007/s12149-012-0581-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 01/25/2012] [Indexed: 11/30/2022]
Abstract
OBJECTIVE We recently developed an integrated positron emission tomography (PET)/magnetic resonance imaging (MRI) (iPET/MRI) scanner for small animals, which had relatively large field-of-view (FOV) covering up to the size of a rat body. The purpose of this study was to report results of simultaneous PET/MRI of a rat body using this scanner with some radiotracers. METHODS C-11-methionine (MET), F-18-fluorodeoxyglucose (FDG), or F-18-sodium fluoride (NaF) was injected as a radiotracer for PET portion in addition to gadolinium-ethoxybenzyl-diethylenetriamine penta-acetic acid, a hepatobiliary contrast agent, for MRI portion. Simultaneous PET/MRI was performed in normal rats. PET, MRI, and co-registered fusion images were evaluated regarding image quality and feasibility for rat imaging studies. RESULTS MET uptake was clearly shown in the liver and pancreas, which was confirmed with magnetic resonance (MR) and fused PET/MR images. PET/MR images depicted intense FDG uptake in the brain, Harderian glands, and myocardium. NaF uptake was observed in all bones and joints within FOV, except in ribs, which was well recognized with the help of MR and fused PET/MR images. CONCLUSION This study demonstrated that simultaneous PET/MRI with an integrated dual-modality molecular imaging scanner was a feasible technique for imaging studies targeting on a rat body. However, further developments including attenuation correction methods are required to use this technique routinely in rat imaging studies.
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Yamamoto S, Watabe H, Kanai Y, Shimosegawa E, Hatazawa J. Development of a pixelated GSO gamma camera system with tungsten parallel hole collimator for single photon imaging. Med Phys 2012; 39:581-8. [DOI: 10.1118/1.3673774] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Onishi H, Hatazawa J, Nakagawara J, Ito K, Ha-Kawa SK, Masuda Y, Sugibayashi K, Takahashi M, Kikuchi K, Katsuta N. [Availability of normal database by single photon emission computed tomography system with use of 3 dimensional-stereotactic surface projections]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2012; 68:1608-1616. [PMID: 23257590 DOI: 10.6009/jjrt.2012_jsrt_68.12.1608] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
PURPOSE The present study aims to quantitatively investigate a normal database (NDB) created under the same acquisition and reconstruction conditions for three gamma camera systems (four types of collimator systems) with use of three-dimensional stereotactic surface projections (3D-SSP). We rebuilt a NDB with use of the N-isopropyl-p-(123)I-iodoamphetamine ((123)I-IMP) SPECT data derived from 30 healthy individuals at 20 institutions nationwide. We standardized the acquisition and reconstruction conditions, evaluated Z scores using patient data (PD) and examined each compensation effect. RESULTS Z scores determined using the advanced NDB were the same value. Artifacts were often generated in Z score maps derived from the conventional NDB (CONDB). The Z score of the own site NDB (OWNDB) was 70% of that calculated based on the CONDB. The combinatorial difference in compensation (scatter and attenuation) resulted in many artifacts being generated in Z score map images. DISCUSSIONS More artifacts were generated in Z score map images using the novel NDB compared with the CONDB. The novel NDB was comparable to the performance of OWNB. The accuracy of brain function image analysis can be improved the reconstruction conditions and correcting for scatter and attenuation on both the novel NDB and PD.
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Yamamoto S, Watabe T, Watabe H, Aoki M, Sugiyama E, Imaizumi M, Kanai Y, Shimosegawa E, Hatazawa J. Simultaneous imaging using Si-PM-based PET and MRI for development of an integrated PET/MRI system. Phys Med Biol 2011; 57:N1-13. [DOI: 10.1088/0031-9155/57/2/n1] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Yamamoto S, Watabe H, Kanai Y, Imaizumi M, Watabe T, Shimosegawa E, Hatazawa J. Development of a high-resolution Si-PM-based gamma camera system. Phys Med Biol 2011; 56:7555-67. [PMID: 22080091 DOI: 10.1088/0031-9155/56/23/014] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A silicon photomultiplier (Si-PM) is a promising photodetector for PET, especially for PET/MRI combined systems, due to its high gain, small size, and lower sensitivity to static magnetic fields. However, these properties are also promising for gamma camera systems for single-photon imaging. We developed an ultra-high-resolution Si-PM-based compact gamma camera system for small animals. Y(2)SiO(5):Ce (YSO) was selected as scintillators because of its high light output and no natural radioactivity. The gamma camera consists of 0.6 mm × 0.6 mm × 6 mm YSO pixels combined with a 0.1 mm thick reflector to form a 17 × 17 matrix that was optically coupled to a Si-PM array (Hamamatsu multi-pixel photon counter S11064-050P) with a 2 mm thick light guide. The YSO block size was 12 mm × 12 mm. The YSO gamma camera was encased in a 5 mm thick gamma shield, and a parallel hole collimator was mounted in front of the camera (0.5 mm hole, 0.7 mm separation, 5 mm thick). The two-dimensional distribution for the Co-57 gamma photons (122 keV) was almost resolved. The energy resolution was 24.4% full-width at half-maximum (FWHM) for the Co-57 gamma photons. The spatial resolution at 1.5 mm from the collimator surface was 1.25 mm FWHM measured using a 1 mm diameter Co-57 point source. Phantom and small animal images were successfully obtained. We conclude that a Si-PM-based gamma camera is promising for molecular imaging research.
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Yamamoto S, Hatazawa J. Development of an alpha/beta/gamma detector for radiation monitoring. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2011; 82:113503. [PMID: 22128972 DOI: 10.1063/1.3658821] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
For radiation monitoring at the site of nuclear power plant accidents such as Fukushima Daiichi, radiation detectors not only for gamma photons but also for alpha and beta particles are needed because some nuclear fission products emit beta particles and gamma photons and some nuclear fuels contain plutonium that emits alpha particles. We developed a radiation detector that can simultaneously monitor alpha and beta particles and gamma photons for radiation monitoring. The detector consists of three-layered scintillators optically coupled to each other and coupled to a photomultiplier tube. The first layer, which is made of a thin plastic scintillator (decay time: 2.4 ns), detects alpha particles. The second layer, which is made of a thin Gd(2)SiO(5) (GSO) scintillator with 1.5 mol.% Ce (decay time: 35 ns), detects beta particles. The third layer made of a thin GSO scintillator with 0.4 mol.% Ce (decay time: 70 ns) detects gamma photons. By using pulse shape discrimination, the count rates of these layers can be separated. With individual irradiation of alpha and beta particles and gamma photons, the count rate of the first layer represented the alpha particles, the second layer represented the beta particles, and the third layer represented the gamma photons. Even with simultaneous irradiation of the alpha and beta particles and the gamma photons, these three types of radiation can be individually monitored using correction for the gamma detection efficiency of the second and third layers. Our developed alpha, beta, and gamma detector is simple and will be useful for radiation monitoring, especially at nuclear power plant accident sites or other applications where the simultaneous measurements of alpha and beta particles and gamma photons are required.
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Bluml S, Panigrahy A, Laskov M, Dhall G, Nelson MD, Finlay JL, Gilles FH, Arita H, Kinoshita M, Kagawa N, Fujimoto Y, Hashimoto N, Yoshimine T, Kinoshita M, Arita H, Kagawa N, Fujimoto Y, Hashimoto N, Yoshimine T, Hamilton JD, Wang J, Levin VA, Hou P, Loghin ME, Gilbert MR, Leeds NE, deGroot JF, Puduvalli V, Jackson EF, Yung WKA, Kumar AJ, Ellingson BM, Cloughesy TF, Pope WB, Zaw T, Phillips H, Lalezari S, Nghiemphu PL, Ibrahim H, Motevalibashinaeini K, Lai A, Ellingson BM, Cloughesy TF, Zaw T, Harris R, Lalezari S, Nghiemphu PL, Motevalibashinaeini K, Lai A, Pope WB, Douw L, Van de Nieuwenhuijzen ME, Heimans JJ, Baayen JC, Stam CJ, Reijneveld JC, Juhasz C, Mittal S, Altinok D, Robinette NL, Muzik O, Chakraborty PK, Barger GR, Ellingson BM, Cloughesy TF, Zaw TM, Lalezari S, Nghiemphu PL, Motevalibashinaeini K, Lai A, Goldin J, Pope WB, Ellingson BM, Cloughesy TF, Harris R, Pope WB, Nghiemphu PL, Lai A, Zaw T, Chen W, Ahlman MA, Giglio P, Kaufmann TJ, Anderson SK, Jaeckle KA, Uhm JH, Northfelt DW, Flynn PJ, Buckner JC, Galanis E, Zalatimo O, Weston C, Allison D, Bota D, Kesari S, Glantz M, Sheehan J, Harbaugh RE, Chiba Y, Kinoshita M, Kagawa N, Fujimoto Y, Tsuboi A, Hatazawa J, Sugiyama H, Hashimoto N, Yoshimine T, Nariai T, Toyohara J, Tanaka Y, Inaji M, Aoyagi M, Yamamoto M, Ishiwara K, Ohno K, Jalilian L, Essock-Burns E, Cha S, Chang S, Prados M, Butowski N, Nelson S, Kawahara Y, Nakada M, Hayashi Y, Kai Y, Hayashi Y, Uchiyama N, Kuratsu JI, Hamada JI, Yeom K, Rosenberg J, Andre JB, Fisher PG, Edwards MS, Barnes PD, Partap S, Essock-Burns E, Jalilian L, Lupo JM, Crane JC, Cha S, Chang SM, Nelson SJ, Romanowski CA, Hoggard N, Jellinek DA, Clenton S, McKevitt F, Wharton S, Craven I, Buller A, Waddle C, Bigley J, Wilkinson ID, Metherall P, Eckel LJ, Keating GF, Wetjen NM, Giannini C, Wetmore C, Jain R, Narang J, Arbab AS, Schultz L, Scarpace L, Mikkelsen T, Babajni-Feremi A, Jain R, Poisson L, Narang J, Scarpace L, Gutman D, Jaffe C, Saltz J, Flanders A, Daniel B, Mikkelsen T, Zach L, Guez D, Last D, Daniels D, Hoffman C, Mardor Y, Guha-Thakurta N, Debnam JM, Kotsarini C, Wilkinson ID, Jellinek D, Griffiths PD, Khandanpour N, Hoggard N, Kotsarini C, Wilkinson ID, Jellinek D, Griffiths PD, Bambrough P, Hoggard N, Hamilton JD, Levin VA, Hou P, Prabhu S, Loghin ME, Gilbert MR, Bassett RL, Wang J, Yung WA, Jackson EF, Kumar AJ, Campen CJ, Soman S, Fisher PG, Edwards MS, Yeom KW, Vos MJ, Berkhof J, Postma TJ, Sanchez E, Sizoo EM, Heimans JJ, Lagerwaard FJ, Buter J, Noske DP, Reijneveld JC, Colen RR, Mahajan B, Jolesz FA, Zinn PO, Lupo JM, Molinaro A, Chang S, Lawton K, Cha S, Nelson SJ, Alexandru D, Bota D, Linskey ME, Chaumeil MM, Gini B, Yang H, Iwanami A, Subramanian S, Ozawa T, Read EJ, Pieper RO, Mischel P, James CD, Ronen SM, LaViolette PS, Cochran E, Al-Gizawiy M, Connelly JM, Malkin MG, Rand SD, Mueller WM, Schmainda KM, LaViolette PS, Cohen AD, Cochran E, Prah M, Hartman CJ, Connelly JM, Rand SD, Malkin MG, Mueller WM, Schmainda KM, Qiao XJ, He R, Brown M, Goldin J, Cloughesy T, Pope WB. RADIOLOGY. Neuro Oncol 2011; 13:iii136-iii144. [PMCID: PMC3222969 DOI: 10.1093/neuonc/nor162] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023] Open
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Takahashi R, Hirata H, Tachibana I, Shimosegawa E, Inoue A, Nagatomo I, Takeda Y, Kida H, Goya S, Kijima T, Yoshida M, Kumagai T, Kumanogoh A, Okumura M, Hatazawa J, Kawase I. Early [18F]fluorodeoxyglucose positron emission tomography at two days of gefitinib treatment predicts clinical outcome in patients with adenocarcinoma of the lung. Clin Cancer Res 2011; 18:220-8. [PMID: 22019513 DOI: 10.1158/1078-0432.ccr-11-0868] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
PURPOSE Positron emission tomography (PET) with [(18)F]fluorodeoxyglucose (FDG) is increasingly used in early assessment of tumor response after chemotherapy. We investigated whether a change in [(18)F]FDG uptake at 2 days of gefitinib treatment predicts outcome in patients with lung adenocarcinoma. EXPERIMENTAL DESIGN Twenty patients were enrolled. [(18)F]FDG-PET/computed tomographic (CT) scan was carried out before and 2 days after gefitinib treatment. Maximum standardized uptake values (SUV) were measured, and post-gefitinib percentage changes in SUV were calculated. Early metabolic response (SUV decline < -25%) was compared with morphologic response evaluated by CT scan and with progression-free survival (PFS). RESULTS At 2 days of gefitinib treatment, 10 patients (50%) showed metabolic response, 8 had metabolic stable disease, and 2 had progressive metabolic disease. Percentage changes of SUV at 2 days were correlated with those of tumor size in CT at 1 month (R(2) = 0.496; P = 0.0008). EGFR gene was assessable in 15 patients, and of 12 patients with EGFR mutations, 8 showed metabolic response at 2 days and 6 showed morphologic response at 1 month. None of 3 patients with wild-type EGFR showed metabolic or morphologic response. Metabolic response at 2 days was not statistically associated with PFS (P = 0.095), but when a cutoff value of -20% in SUV decline was used, metabolic responders had longer PFS (P < 0.0001). CONCLUSION Early assessment of [(18)F]FDG tumor uptake with PET at 2 days of gefitinib treatment could be useful to predict clinical outcome earlier than conventional CT evaluation in patients with lung adenocarcinoma.
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Kimura Y, Siméon FG, Zoghbi SS, Zhang Y, Hatazawa J, Pike VW, Innis RB, Fujita M. Quantification of metabotropic glutamate subtype 5 receptors in the brain by an equilibrium method using 18F-SP203. Neuroimage 2011; 59:2124-30. [PMID: 22032949 DOI: 10.1016/j.neuroimage.2011.10.028] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 09/07/2011] [Accepted: 10/10/2011] [Indexed: 12/01/2022] Open
Abstract
A new PET ligand, 3-fluoro-5-(2-(2-(18)F-(fluoromethyl)-thiazol-4-yl)ethynyl)benzonitrile (18F-SP203) can quantify metabotropic glutamate subtype 5 receptors (mGluR5) in human brain by a bolus injection and kinetic modeling. As an alternative approach to a bolus injection, binding can simply be measured as a ratio of tissue to metabolite-corrected plasma at a single time point under equilibrium conditions achieved by administering the radioligand with a bolus injection followed by a constant infusion. The purpose of this study was to validate the equilibrium method as an alternative to the standard kinetic method for measuring 18F-SP203 binding in the brain. Nine healthy subjects were injected with 18F-SP203 using a bolus plus constant infusion for 300 min. A single ratio of bolus-to-constant infusion (the activity of bolus equaled to that of infusion over 219 min) was applied to all subjects to achieve equilibrium in approximately 120 min. As a measure of ligand binding, we compared total distribution volume (VT) calculated by the equilibrium and kinetic methods in each scan. The equilibrium method calculated VT by the ratio of radioactivity in the brain to the concentration of 18F-SP203 in arterial plasma at 120 min, and the kinetic method calculated VT by a two-tissue compartment model using brain and plasma dynamic data from 0 to 120 min. VT obtained via the equilibrium method was highly correlated with VT obtained via kinetic modeling. Inter-subject variability of VT obtained via the equilibrium method was slightly smaller than VT obtained via the kinetic method. VT obtained via the equilibrium method was ~10% higher than VT obtained via the kinetic method, indicating a small difference between the measurements. Taken together, the results of this study show that using the equilibrium method is an acceptable alternative to the standard kinetic method when using 18F-SP203 to measure mGluR5. Although small differences in the measurements obtained via the equilibrium and kinetic methods exist, both methods consistently measured mGluR5 as indicated by the highly correlated VT values; the equilibrium method was slightly more precise, as indirectly measured by the smaller coefficient of variability across subjects. In addition, when using 18F-SP203, the equilibrium method is more efficient because it requires much less data.
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Hatazawa J. Cancer screening by FDG-PET: benefit or risk? Ann Nucl Med 2011; 25:667-8. [PMID: 21987285 DOI: 10.1007/s12149-011-0543-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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144
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Yamamoto S, Watabe H, Hatazawa J. Performance comparison of Si-PM-based block detectors with different pixel sizes for an ultrahigh-resolution small-animal PET system. Phys Med Biol 2011; 56:N227-36. [DOI: 10.1088/0031-9155/56/20/n02] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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145
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Yasuda T, Higuchi I, Yano M, Miyata H, Yamasaki M, Takiguchi S, Fujiwara Y, Hatazawa J, Doki Y. The impact of ¹⁸F-fluorodeoxyglucose positron emission tomography positive lymph nodes on postoperative recurrence and survival in resectable thoracic esophageal squamous cell carcinoma. Ann Surg Oncol 2011; 19:652-60. [PMID: 21769466 DOI: 10.1245/s10434-011-1928-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2010] [Indexed: 12/19/2022]
Abstract
BACKGROUND Induction therapy is not always beneficial for all patients. Therefore, it is important to identify the patients with a high rate of recurrence. The occurrence of lymph node metastases (LNMs) strongly influences the postoperative survival in patients with esophageal cancer. We investigated the usefulness of an LN evaluation by initial (18)F-fluorodeoxyglucose (FDG) positron emission tomography (PET) in prediction of postoperative recurrence for patients with resectable esophageal squamous cell carcinoma (ESCC). METHODS A total of 76 ESCC patients who did not undergo induction therapy, but who did receive a curative resection were divided into PET-node (PET-N) positive (n = 26) and negative (n = 50) groups according to the presence or absence of FDG uptake in LNs. The PET-N status was compared with the size and the number of LNMs, as well as with the survival and failure patterns. RESULTS PET positive LNs involved a significantly larger size of metastatic nests than PET negative LNs (P = 0.002). The PET-N negative group showed a higher proportion of patients with 2 or fewer LNMs (92.0%), a higher 5-year relapse-free survival (75.1%) and a higher overall survival (70.0%), and a lower postoperative recurrence (24.0%) than the 15.4, 29.6, 30.3, and 69.2% values in the PET-N positive group, respectively, (P < 0.005). Multivariate analyses identified the PET-N status to be the most significant preoperative risk factor for postoperative recurrence (P = 0.031). CONCLUSION The preoperative PET-N status in patients with resectable ESCC was significantly associated with the size and the number of LNMs and was therefore found to reliably identify the high-risk population for postoperative recurrence.
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Yamamoto S, Watabe H, Kanai Y, Aoki M, Sugiyama E, Watabe T, Imaizumi M, Shimosegawa E, Hatazawa J. Interference between PET and MRI sub-systems in a silicon-photomultiplier-based PET/MRI system. Phys Med Biol 2011; 56:4147-59. [DOI: 10.1088/0031-9155/56/13/026] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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147
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Hatano K, Ido T, Ishiwata K, Kawashiroa K, Hatazawa J, Itoh M, Iwata R. Synthesis of [18F]fluoroalkylated analogues of a benzamide nuroleptic; YM-09151-2. J Labelled Comp Radiopharm 2011. [DOI: 10.1002/jlcr.25802601142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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148
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Yamamoto S, Satomi J, Watabe T, Watabe H, Kanai Y, Imaizumi M, Shimosegawa E, Hatazawa J. A temperature-dependent gain control system for improving the stability of Si-PM-based PET systems. Phys Med Biol 2011; 56:2873-82. [DOI: 10.1088/0031-9155/56/9/015] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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149
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Yoshida T, Kazui H, Tokunaga H, Kito Y, Kubo Y, Kimura N, Morihara T, Shimosegawa E, Hatazawa J, Takeda M. Protein synthesis in the posterior cingulate cortex in Alzheimer's disease. Psychogeriatrics 2011; 11:40-5. [PMID: 21447108 DOI: 10.1111/j.1479-8301.2010.00350.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Neuroimaging studies using (18) F-fluoro-2-deoxy-D-glucose positron emission tomography (FDG-PET) and single photon emission computed tomography (SPECT) have shown that the posterior cingulate cortex (PCC) is the primary and most prominent area of cerebral metabolic and perfusional decrement in early Alzheimer's disease (AD). We carried out the present preliminary study to investigate whether a decline of cerebral blood flow (CBF) in the PCC in early to moderate AD was accompanied with that of cerebral protein synthesis (CPS). METHODS We carried out both N-isopropyl-p-[123I] iodoamphetamine SPECT (IMP-SPECT) and L-[methyl-11C] methionine positron emission tomography (MET-PET) in eight AD patients with apolipoprotein E epsilon 4 allele in the early to moderate stage. We also carried out IMP-SPECT in eight healthy controls (HC). We located 32 regions of interest (ROI), and values of regional MET or IMP uptakes were averaged in five regions; the frontal lobe (FL), the parietal lobe (PL), the medial temporal lobe (MTL), PCC and the occipital lobe. Furthermore, the values in the FL, PL, MTL and PCC were divided by values in the occipital areas, and normalized values of regional CBF (rCBF) and CPS (rCPS) were calculated. Then, the rCBF in the FL, PL, MTL and PCC were compared between AD and HC. In addition, the rCBF and rCPS were compared in the FL, PL, MTL and PCC of AD. RESULTS The rCBF in the PCC, but not in the other three regions, was significantly lower in AD than in HC. The rCBF was significantly lower than rCPS in the PCC, but rCBF and rCPS were comparable in the other three regions in AD. CONCLUSIONS The CBF reduction in the PCC in AD was partly caused by neuronal loss in the PCC and partly supported the hypothesis that CBF reduction in the PCC was a result of functional deafferentation by neural degeneration in areas other than the PCC.
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Kazui H, Yoshida T, Takaya M, Sugiyama H, Yamamoto D, Kito Y, Wada T, Nomura K, Yasuda Y, Yamamori H, Ohi K, Fukumoto M, Iike N, Iwase M, Morihara T, Tagami S, Shimosegawa E, Hatazawa J, Ikeda Y, Uchida E, Tanaka T, Kudo T, Hashimoto R, Takeda M. Different characteristics of cognitive impairment in elderly schizophrenia and Alzheimer's disease in the mild cognitive impairment stage. Dement Geriatr Cogn Dis Extra 2011; 1:20-30. [PMID: 22163230 PMCID: PMC3199876 DOI: 10.1159/000323561] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
We compared indices of the revised version of the Wechsler Memory Scale (WMS-R) and scaled scores of the five subtests of the revised version of the Wechsler Adult Intelligence Scale (WAIS-R) in 30 elderly schizophrenia (ES) patients and 25 Alzheimer's disease (AD) patients in the amnestic mild cognitive impairment (aMCI) stage (AD-aMCI). In the WMS-R, attention/concentration was rated lower and delayed recall was rated higher in ES than in AD-aMCI, although general memory was comparable in the two groups. In WAIS-R, digit symbol substitution, similarity, picture completion, and block design scores were significantly lower in ES than in AD-aMCI, but the information scores were comparable between the two groups. Delayed recall and forgetfulness were less impaired, and attention, working memory and executive function were more impaired in ES than in AD-aMCI. These results should help clinicians to distinguish ES combined with AD-aMCI from ES alone.
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