Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Hisatoshi Maeda"'
Publikováno v:
Nuclear Medicine and Molecular Imaging. 51:331-337
The differences in performance between the cadmium-zinc-telluride (CZT) camera or collimation systems and conventional Anger single-photon emission computed tomography (A-SPECT) remain insufficient from the viewpoint of the user. We evaluated the per
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::30fdb1e73eeb20147d91c5164658ff1b
https://doi.org/10.1007/s13139-017-0474-9
https://doi.org/10.1007/s13139-017-0474-9
Publikováno v:
Nuclear medicine and molecular imaging. 53(1)
OBJECTIVE: A recently introduced single-photon emission computed tomography (SPECT), based on cadmium-zinc-telluride (CZT) detectors (D-SPECT), supports high energy resolution for cardiac imaging. Importantly, the high energy resolution may allow sim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1a43b02f2a66ae848d6a457a1eb79de
https://pubmed.ncbi.nlm.nih.gov/30828402
https://pubmed.ncbi.nlm.nih.gov/30828402
Publikováno v:
Nuclear medicine and molecular imaging. 51(3)
This study quantified the contraction synchronicity (CS; with 100% representing full synchrony and −100% dyssynchrony) and contraction work (CW, millijoules per centimeter squared; representing myocardial area) in patients with reduced left ventric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eae012cfdbe819a3085da220798d50f9
https://pubmed.ncbi.nlm.nih.gov/28878848
https://pubmed.ncbi.nlm.nih.gov/28878848
Publikováno v:
Australasian Physical & Engineering Sciences in Medicine. 34:481-488
Aims of present study were to examine usefulness of information theory in visual assessment of image quality. We applied first order approximation of the Shannon’s information theory to compute information losses (IL). Images of a contrast-detail m
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32b4bab9c923dc821ba8dc3d243c4f65
https://doi.org/10.1007/s13246-011-0108-y
https://doi.org/10.1007/s13246-011-0108-y
Publikováno v:
European Journal of Radiology. 61:362-366
We applied information theory to quantify information losses in assessing contrast-detail (C-D) analysis. Images of a C-D phantom were acquired with a flat panel detector (FPD) and a computed radiography (CR) by changing surface entrance doses. Six p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f754605d35da680a617a510505649e09
https://doi.org/10.1016/j.ejrad.2006.09.009
https://doi.org/10.1016/j.ejrad.2006.09.009
Publikováno v:
European Journal of Radiology. 57:158-161
Evaluation of observer's image perception in medical images is important, and yet has not been performed because it is difficult to quantify visual characteristics. In the present study, we investigated the observer's image perception by clustering a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::db7c5a2cd8278d3431a25aa8e5891a7f
https://doi.org/10.1016/j.ejrad.2005.05.015
https://doi.org/10.1016/j.ejrad.2005.05.015
Autor:
Hisatoshi Maeda
Publikováno v:
Physiological Measurement. 25:71-84
Intact heart muscles are believed to contract synchronously to produce maximum effective work at a minimum energy cost. Temporal correlation coefficients between the left ventricular volume and muscle contraction were introduced to assess the synchro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b950379c1d3c6ba2b813cdef58361ea
https://doi.org/10.1088/0967-3334/25/1/007
https://doi.org/10.1088/0967-3334/25/1/007
Autor:
Hisatoshi Maeda, Seiichi Era, Shigeru Matsushima, Junichi Sakamoto, Fumio Sasaki, Masaru Sogami, Hikaru Ohsaki, Yasushi Yatabe, Yasutomi Kinosada, Shigeto Miura
Publikováno v:
ResearcherID
A prospective study was performed to investigate the correlations between saturation transfer ratio (STR) and histologic parameters of invasive ductal carcinomas in human breast. The histologic parameters investigated were the extent of fibrosis in t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::42a7b49a59e73290bf8c24280b8dd8b5
https://doi.org/10.1016/s0730-725x(99)00146-0
https://doi.org/10.1016/s0730-725x(99)00146-0
Publikováno v:
Cardiovascular engineering and technology. 6(1)
Assessment of regional contraction is considered important for diagnosis of coronary artery disease (CAD). We evaluated the synchronicity in regional contraction and assessed recovery from contraction insufficiency after revascularizations. Myocardia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f25094f6c3f98385300d38b02ac03ea7
https://pubmed.ncbi.nlm.nih.gov/26577099
https://pubmed.ncbi.nlm.nih.gov/26577099
Publikováno v:
Magnetic Resonance Imaging. 14:1067-1072
We studied the validity of using an external signal reference for absolute quantification of brain metabolites. We chose cyclohexane as the signal standard. An expression of a perturbed magnetic field in diamagnetic cylindrical materials was first ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4a19f3c022a24355012b5d38ac384d0
https://doi.org/10.1016/s0730-725x(96)00117-8
https://doi.org/10.1016/s0730-725x(96)00117-8