{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,24]],"date-time":"2026-09-24T00:07:00Z","timestamp":1790208420861,"version":"4.1.0"},"reference-count":25,"publisher":"SPIE-Intl Soc Optical Eng","issue":"04","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Med. Imag."],"published-print":{"date-parts":[[2024,8,22]]},"abstract":"<jats:p>PurposeWe aim to compare the imaging performance of a cone-beam CT (CBCT) imaging system with noncircular scan protocols (sine-on-sphere) to a conventional circular orbit.ApproachA biplane C-arm system (ARTIS Icono; Siemens Healthineers) capable of circular and noncircular CBCT acquisition was used, with the latter orbit (sine-on-sphere, \u201cSine Spin\u201d) executing a sinusoidal motion with \u00b110 deg tilt amplitude over the half-scan orbit. A test phantom was used for the characterization of image uniformity, noise, noise-power spectrum (NPS), spatial resolution [modulation transfer function (MTF) in axial and oblique directions], and cone-beam artifacts. Findings were interpreted using an anthropomorphic head phantom with respect to pertinent tasks in skull base neurosurgery.ResultsThe noncircular scan protocol exhibited several advantages associated with improved 3D sampling\u2014evident in the NPS as filling of the null cone about the fz spatial frequency axis and reduction of cone-beam artifacts. The region of support at the longitudinal extrema was reduced from 16 to \u223c12 cm at a radial distance of 6.5\u00a0cm. Circular and noncircular orbits exhibited nearly identical image uniformity and quantum noise, demonstrating cupping of \u221216.7% and overall noise of \u223c27 HU. Although both the radially averaged axial MTF (fx,y) and 45\u00a0deg oblique MTF (fx,y,z) were \u223c20% lower for the noncircular orbit compared with the circular orbit at the default full reconstruction field of view (FOV), there was no difference in spatial resolution for the medium reconstruction FOV (smaller voxel size). Differences in the perceptual image quality for the anthropomorphic phantom reinforced the objective, quantitative findings, including reduced beam-hardening and cone-beam artifacts about structures of interest in the skull base.ConclusionsImage quality differences between circular and noncircular CBCT orbits were quantitatively evaluated on a clinical system in the context of neurosurgery. The primary performance advantage for the noncircular orbit was the improved sampling and elimination of cone-beam artifacts.<\/jats:p>","DOI":"10.1117\/1.jmi.11.4.043503","type":"journal-article","created":{"date-parts":[[2024,8,22]],"date-time":"2024-08-22T14:10:51Z","timestamp":1724335851000},"page":"1-12","source":"Crossref","is-referenced-by-count":2,"title":["Cone-beam CT with a noncircular (sine-on-sphere) orbit: imaging performance of a clinical system for image-guided interventions"],"prefix":"10.1117","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8245-8573","authenticated-orcid":false,"given":"A. Kyle","family":"Jones","sequence":"first","affiliation":[{"name":"The Univ. of Texas M.D. Anderson Cancer Ctr."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Moiz","family":"Ahmad","sequence":"additional","affiliation":[{"name":"The Univ. of Texas M.D. Anderson Cancer Ctr."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shaan  M.","family":"Raza","sequence":"additional","affiliation":[{"name":"The Univ. of Texas M.D. Anderson Cancer Ctr."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5580-831X","authenticated-orcid":false,"given":"Stephen R.","family":"Chen","sequence":"additional","affiliation":[{"name":"The Univ. of Texas M.D. Anderson Cancer Ctr."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6644-1317","authenticated-orcid":false,"given":"Jeffrey H.","family":"Siewerdsen","sequence":"additional","affiliation":[{"name":"The Univ. of Texas M.D. Anderson Cancer Ctr."}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"189","reference":[{"key":"r1","doi-asserted-by":"publisher","DOI":"10.1109\/NSSMIC.2010.5874387"},{"key":"r2","doi-asserted-by":"publisher","DOI":"10.1016\/j.ijrobp.2011.06.1455"},{"key":"r3","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcms.2012.01.008"},{"key":"r4","first-page":"257","article-title":"Task-based trajectories in iteratively reconstructed interventional cone-beam CT","author":"Stayman","year":"2013"},{"key":"r5","first-page":"274","article-title":"Improved trajectories in C-Arm computed tomography for non-circular fields of view","author":"Herbst","year":"2014"},{"key":"r6","doi-asserted-by":"publisher","DOI":"10.1088\/0031-9155\/61\/7\/2613"},{"key":"r7","doi-asserted-by":"publisher","DOI":"10.1117\/12.2513433"},{"key":"r8","doi-asserted-by":"publisher","DOI":"10.1117\/1.JMI.6.2.025002"},{"key":"r9","doi-asserted-by":"publisher","DOI":"10.1117\/1.JMI.6.2.025004"},{"key":"r10","doi-asserted-by":"publisher","DOI":"10.1007\/s11548-020-02249-1"},{"key":"r11","doi-asserted-by":"publisher","DOI":"10.1088\/1361-6560\/ab9454"},{"key":"r12","doi-asserted-by":"publisher","DOI":"10.1117\/12.2550203"},{"key":"r13","doi-asserted-by":"publisher","DOI":"10.1002\/mp.14403"},{"key":"r14","doi-asserted-by":"publisher","DOI":"10.1097\/RLI.0000000000000885"},{"key":"r15","doi-asserted-by":"publisher","DOI":"10.1117\/12.2612448"},{"key":"r16","doi-asserted-by":"publisher","DOI":"10.1088\/1361-6560\/ac8590"},{"key":"r17","doi-asserted-by":"publisher","DOI":"10.1118\/1.3062875"},{"key":"r18","doi-asserted-by":"publisher","DOI":"10.1117\/1.JMI.10.3.033503"},{"key":"r19","first-page":"66","article-title":"Mathematical framework of cone beam 3D reconstruction via the first derivative of the radon transform","author":"Grangeat","year":"2006"},{"key":"r20","doi-asserted-by":"publisher","DOI":"10.1002\/mp.13952"},{"key":"r21","doi-asserted-by":"publisher","DOI":"10.1117\/12.2654347"},{"key":"r22","doi-asserted-by":"publisher","DOI":"10.1002\/mp.14820"},{"key":"r23","doi-asserted-by":"publisher","DOI":"10.1109\/TRPMS.2019.2918222"},{"key":"r24","doi-asserted-by":"publisher","DOI":"10.1117\/12.2613139"},{"key":"r25","doi-asserted-by":"publisher","DOI":"10.1137\/0143035"}],"container-title":["Journal of Medical Imaging"],"original-title":[],"link":[{"URL":"https:\/\/www.spiedigitallibrary.org\/journals\/journal-of-medical-imaging\/volume-11\/issue-04\/043503\/Cone-beam-CT-with-a-noncircular-sine-on-sphere-orbit\/10.1117\/1.JMI.11.4.043503.full","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,9,23]],"date-time":"2026-09-23T23:48:47Z","timestamp":1790207327000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.spiedigitallibrary.org\/journals\/journal-of-medical-imaging\/volume-11\/issue-04\/043503\/Cone-beam-CT-with-a-noncircular-sine-on-sphere-orbit\/10.1117\/1.JMI.11.4.043503.full"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,8,22]]},"references-count":25,"journal-issue":{"issue":"04","published-online":{"date-parts":[[2024,7,1]]}},"URL":"https:\/\/doi.org\/10.1117\/1.jmi.11.4.043503","relation":{},"ISSN":["2329-4302","2329-4310"],"issn-type":[{"value":"2329-4302","type":"print"},{"value":"2329-4310","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,8,22]]}}}