Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Gerard M. Perera"'
Autor:
Margie Hunt, Jason A. Koutcher, Sasan Karimi, Wei Huang, Ashwatha Narayana, Gerard M. Perera, Zvi Fuks, Sunitha B. Thakur, Jenghwa Chang, Alex Kowalski, Howard Amols
Publikováno v:
Medical Physics. 33:32-40
1H magnetic resonance spectroscopic imaging (MRSI) can improve the accuracy of target delineation for gliomas, but it lacks the anatomic resolution needed for image fusion. This paper presents a simple protocol for fusing simulation computer tomograp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79193312f4315970a2b88b645d44ac6a
https://doi.org/10.1118/1.2128497
https://doi.org/10.1118/1.2128497
Autor:
Richard Mayeux, Arun S. Nava, Robert L. DeLaPaz, Scott A. Small, Yaakov Stern, Gerard M. Perera
Publikováno v:
Nature Neuroscience. 4:442-449
Circuits within the hippocampal formation are active during memory processing. Here we used functional magnetic resonance imaging (fMRI) to examine multiple sites across the long axis of the hippocampal formation while subjects performed different ph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::66a02beada968834a102696887361ffc
https://doi.org/10.1038/86115
https://doi.org/10.1038/86115
Autor:
Robert C. Constantine, Robert DeLaPaz, John W. Krakauer, Randolph S. Marshall, Ronald M. Lazar, Gerard M. Perera
Publikováno v:
Stroke. 31:656-661
Background and Purpose —Recovery from hemiparesis due to corticospinal tract infarction is well documented, but the mechanism of recovery is unknown. Functional MRI (fMRI) provides a means of identifying focal brain activity related to movement of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::519dcb45d4919a2a10eaeeefc6731f9b
https://doi.org/10.1161/01.str.31.3.656
https://doi.org/10.1161/01.str.31.3.656
Publikováno v:
Microscopy Research and Technique. 51:101-108
Memory ability declines in older age groups. There is a growing list of physiological processes that target the hippocampal formation in an age-related fashion, and some might underlie the hippocampal component of memory decline. The hippocampal form
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d57365bf4baf81bc91c9941f9c9947be
https://doi.org/10.1002/1097-0029(20001001)51:1<101::aid-jemt11>3.0.co
https://doi.org/10.1002/1097-0029(20001001)51:1<101::aid-jemt11>3.0.co
Publikováno v:
Annals of Neurology. 45:466-472
The hippocampal formation is composed of separate anatomical regions interconnected to form a circuit, and investigating abnormal hippocampal function is most revealing at the level of these regions. Until recently, regional analysis of the hippocamp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d95b3fbabe26657e6eb5b501a20ff3ce
https://doi.org/10.1002/1531-8249(199904)45:4<466::aid-ana8>3.0.co
https://doi.org/10.1002/1531-8249(199904)45:4<466::aid-ana8>3.0.co
Autor:
Lotfi Hacein-Bey, Gerard M. Perera, Jay P. Mohr, W. L. Young, Sam Das, Randolph S. Marshall, John Pile-Spellman
Publikováno v:
Human Brain Mapping. 4:168-173
We mapped motor function in a patient with a cerebral arteriovenous malformation (AVM) before and after treatment with endovascular embolization. Functional activation using technetium-99m-hexamethylpropyleneamine single photon emission tomography (9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7adf2e902726b81dc3f34dee1cc0d3a
https://doi.org/10.1002/(sici)1097-0193(1996)4:3<168::aid-hbm2>3.0.co
https://doi.org/10.1002/(sici)1097-0193(1996)4:3<168::aid-hbm2>3.0.co
Publikováno v:
Applied optics. 34(19)
Various optical arrangements of a double-wedge-plate shearing interferometer are presented for checking laser beam collimation. The use of moire fringes is found to be advantageous for setting the shear fringes parallel to the direction of shear in o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6fcc7bd6fabf7f41b147bd721c43ab2a
https://pubmed.ncbi.nlm.nih.gov/21052180
https://pubmed.ncbi.nlm.nih.gov/21052180
Verification of beam placement accuracy in gamma knife radiosurgery by a BANG3 polymer gel dosimeter
Publikováno v:
Proceedings of the 22nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (Cat. No.00CH37143).
Polymer gel dosimeter BANG3(R) was used to measure beam placement accuracy of a Leksell Gamma Knife radiosurgery unit. The authors did two experiments over a five-month period. Both show a 1.8-mm (corresponding to the size of two pixels) shift of mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31f219f0ece4c2df7d0a27f1d44f7d9e
https://doi.org/10.1109/iembs.2000.901294
https://doi.org/10.1109/iembs.2000.901294
Publikováno v:
Progress in neuro-psychopharmacologybiological psychiatry. 26(4)
Four healthy, cognitively intact elders participated. Subjects underwent fMRI scanning while performing a word recognition task with an easy condition (low demand) and a difficult condition titrated to each subject's ability (titrated demand). Relati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2b98208f29ad8386d5fcd86ff8ec417b
https://pubmed.ncbi.nlm.nih.gov/12188095
https://pubmed.ncbi.nlm.nih.gov/12188095
Image distortion in MRI-based polymer gel dosimetry of gamma knife stereotactic radiosurgery systems
Publikováno v:
Medical physics. 29(5)
We have studied effects of MR (magnetic resonance) image distortion on polymer gel dosimetry of Gamma Knife stereotactic radiosurgery systems. MR images of BANG polymer gel phantoms were acquired by using a Hahn spin-echo sequence and a fast 3D imagi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ec3afeff7e1986c08da2db2074c2b0a3
https://pubmed.ncbi.nlm.nih.gov/12033575
https://pubmed.ncbi.nlm.nih.gov/12033575