{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,21]],"date-time":"2025-11-21T12:00:35Z","timestamp":1763726435007,"version":"3.41.2"},"reference-count":26,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2010,10,5]],"date-time":"2010-10-05T00:00:00Z","timestamp":1286236800000},"content-version":"vor","delay-in-days":277,"URL":"http:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"funder":[{"name":"Netherlands Organization for Scientific Research","award":["917.36.335"],"award-info":[{"award-number":["917.36.335"]}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["International Journal of Biomedical Imaging"],"published-print":{"date-parts":[[2010,1]]},"abstract":"<jats:p><jats:italic>Introduction<\/jats:italic>. Spatially registering SPECT with CT makes it possible to anatomically localize SPECT tracers. In this study, an accurate method for the coregistration of ultra\u2010high\u2010resolution SPECT volumes and multiple cone\u2010beam CT volumes is developed and validated, which does not require markers during animal scanning. \n<jats:italic>Methods<\/jats:italic>. Transferable animal beds were developed with an accurate mounting interface. Simple calibration phantoms make it possible to obtain both the spatial transformation matrix for stitching multiple CT scans of different parts of the animal and to register SPECT and CT. The spatial transformation for image coregistration is calculated once using Horn\u2032s matching algorithm. Animal images can then be coregistered without using markers. \n<jats:italic>Results<\/jats:italic>. For mouse\u2010sized objects, average coregistration errors between SPECT and CT in <jats:italic>X<\/jats:italic>, <jats:italic>Y<\/jats:italic>, and <jats:italic>Z<\/jats:italic> directions are within 0.04\u2009mm, 0.10\u2009mm, and 0.19\u2009mm, respectively. For rat\u2010sized objects, these numbers are 0.22\u2009mm, 0.14\u2009mm, and 0.28\u2009mm. Average 3D coregistration errors were within 0.24\u2009mm and 0.42\u2009mm for mouse and rat imaging, respectively. \n<jats:italic>Conclusion<\/jats:italic>. Extending the field\u2010of\u2010view of cone\u2010beam CT by stitching is improved by prior registration of the CT volumes. The accuracy of registration between SPECT and CT is typically better than the image resolution of current ultra\u2010high\u2010resolution SPECT.<\/jats:p>","DOI":"10.1155\/2010\/654506","type":"journal-article","created":{"date-parts":[[2010,10,5]],"date-time":"2010-10-05T19:44:50Z","timestamp":1286307890000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Accurate Coregistration between Ultra\u2010High\u2010Resolution Micro\u2010SPECT and Circular Cone\u2010Beam Micro\u2010CT Scanners"],"prefix":"10.1155","volume":"2010","author":[{"given":"Changguo","family":"Ji","sequence":"first","affiliation":[]},{"given":"Frans","family":"van der Have","sequence":"additional","affiliation":[]},{"given":"Hugo","family":"Gratama van Andel","sequence":"additional","affiliation":[]},{"given":"Ruud","family":"Ramakers","sequence":"additional","affiliation":[]},{"given":"Freek","family":"Beekman","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2010,10,5]]},"reference":[{"key":"e_1_2_7_1_2","doi-asserted-by":"publisher","DOI":"10.2967\/jnumed.107.050195"},{"key":"e_1_2_7_2_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00259\u2010006\u20100364\u20103"},{"key":"e_1_2_7_3_2","doi-asserted-by":"publisher","DOI":"10.1007\/s00259\u2010007\u20100434\u20101"},{"key":"e_1_2_7_4_2","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.bioeng.8.061505.095728"},{"key":"e_1_2_7_5_2","first-page":"128","article-title":"Multimodality isolated bed system for mouse imaging experiments","volume":"5","author":"Stout D. 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