{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,30]],"date-time":"2025-10-30T11:38:43Z","timestamp":1761824323891,"version":"3.33.0"},"reference-count":24,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2021,10,20]],"date-time":"2021-10-20T00:00:00Z","timestamp":1634688000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["aapm.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Medical Physics"],"published-print":{"date-parts":[[2021,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Magnetic resonance imaging (MRI) is commonly used in treatment planning for stereotactic radiosurgery (SRS) of trigeminal neuralgia (TN). With current MRI techniques, the delineation of the trigeminal nerve root entry zone (REZ) may be degraded due to poor contrast and artifacts. The purpose of this work is to develop an MRI technique with better delineation of the trigeminal nerve REZ to improve SRS treatment planning for TN.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>A spiral fluid\u2010attenuated inversion recovery (FLAIR) MRI technique was developed to improve image quality by improving tissue contrast, fluid suppression, artifact reduction, and signal\u2010to\u2010noise ratio (SNR). A concomitant\u2010phase compensation method based on spiral gradient waveforms was implemented to minimize artifacts due to magnetic field change induced by the metal frame used in Gamma Knife treatment planning. The image quality of spiral FLAIR was assessed in four healthy volunteers. The geometric accuracy was quantitatively evaluated by registering spiral FLAIR to computed tomography (CT) images and comparing it with existing MRI techniques.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The spiral FLAIR technique demonstrated better delineation of the trigeminal nerve REZ, improved tissue contrast of the brain stem, and minimized flow artifacts, compared to steady\u2010state free precession (SSFP) MRI. Spiral FLAIR also improved fluid suppression, SNR, and artifacts, which contributed to better delineation of the trigeminal nerve REZ compared to conventional Cartesian FLAIR. The measured mean (\u00b1 standard deviation) distance between spiral FLAIR and CT images is 0.98 \u00b1 0.56\u00a0mm, comparable to 0.40 \u00b1 0.26\u00a0mm in 3T T1 spoiled gradient echo (T1\u2010SPGR), 0.59 \u00b1 0.25\u00a0mm in 3T SSFP, 0.66 \u00b1 0.38\u00a0mm in 1.5T T1\u2010SPGR, and 0.61 \u00b1 0.25\u00a0mm in 1.5T Cartesian FLAIR.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>A spiral FLAIR technique with improved image quality and good geometric accuracy provides a potential alternative for treatment planning in SRS for TN patients.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mp.15271","type":"journal-article","created":{"date-parts":[[2021,10,10]],"date-time":"2021-10-10T10:35:03Z","timestamp":1633862103000},"page":"6881-6888","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Technical note: A spiral fluid\u2010attenuated inversion recovery magnetic resonance imaging technique for stereotactic radiosurgery treatment planning for trigeminal neuralgia"],"prefix":"10.1002","volume":"48","author":[{"given":"Zhiqiang","family":"Li","sequence":"first","affiliation":[{"name":"Department of Neuroradiology Barrow Neurological Institute  Phoenix Arizona USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shiv P.","family":"Srivastava","sequence":"additional","affiliation":[{"name":"Department of Radiation Oncology Dignity Health Cancer Institute St Joseph's Hospital and Medical Center  Phoenix Arizona USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"John P.","family":"Karis","sequence":"additional","affiliation":[{"name":"Department of Neuroradiology Barrow Neurological Institute  Phoenix Arizona USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2021,10,20]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"publisher","DOI":"10.2147\/CMAR.S140764"},{"key":"e_1_2_10_3_1","doi-asserted-by":"publisher","DOI":"10.1120\/jacmp.v5i3.1997"},{"key":"e_1_2_10_4_1","doi-asserted-by":"publisher","DOI":"10.3978\/j.issn.2218\u2010676X.2014.07.07"},{"key":"e_1_2_10_5_1","doi-asserted-by":"publisher","DOI":"10.3171\/2008.11.JNS08984"},{"key":"e_1_2_10_6_1","unstructured":"Gamma Knife treatment process.Eleckta. 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