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Opt. Express"],"published-print":{"date-parts":[[2024,8,1]]},"abstract":"<jats:p>Recent development of radiotherapy (RT) has heightened the use of radiation in managing pancreatic cancer. Thus, there is a need to investigate pancreatic cancer in a pre-clinical setting to advance our understanding of the role of RT. Widely-used cone-beam CT (CBCT) imaging cannot provide sufficient soft tissue contrast to guide irradiation. The pancreas is also prone to motion. Large collimation is unavoidably used for irradiation, costing normal tissue toxicity. We innovated a bioluminescence tomography (BLT)-guided system to address these needs. We established an orthotopic pancreatic ductal adenocarcinoma (PDAC) mouse model to access BLT. Mice underwent multi-projection and multi-spectral bioluminescence imaging (BLI), followed by CBCT imaging in an animal irradiator for BLT reconstruction and radiation planning. With optimized absorption coefficients, BLT localized PDAC at 1.25\u2009\u00b1\u20090.19 mm accuracy. To account for BLT localization uncertainties, we expanded the BLT-reconstructed volume with margin to form planning target volume(PTV<jats:sub>BLT<\/jats:sub>) for radiation planning, covering 98.7\u2009\u00b1\u20092.2% of PDAC. The BLT-guided conformal plan can cover 100% of tumors with limited normal tissue involvement across both inter-animal and inter-fraction cases, superior to the 2D BLI-guided conventional plan. BLT offers unique opportunities to localize PDAC for conformal irradiation, minimize normal tissue involvement, and support reproducibility in RT studies.<\/jats:p>","DOI":"10.1364\/boe.523916","type":"journal-article","created":{"date-parts":[[2024,5,23]],"date-time":"2024-05-23T16:00:09Z","timestamp":1716480009000},"page":"4525","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["In vivo bioluminescence tomography-guided system for pancreatic cancer radiotherapy research"],"prefix":"10.1364","volume":"15","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6679-151X","authenticated-orcid":true,"given":"Zijian","family":"Deng","sequence":"first","affiliation":[{"name":"University of Texas Southwestern Medical Center"},{"name":"Johns Hopkins School of Medicine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiangkun","family":"Xu","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center"},{"name":"Johns Hopkins School of Medicine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4117-0412","authenticated-orcid":true,"given":"Hamid","family":"Dehghani","sequence":"additional","affiliation":[{"name":"University of Birmingham"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juvenal","family":"Reyes","sequence":"additional","affiliation":[{"name":"Johns Hopkins School of Medicine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lei","family":"Zheng","sequence":"additional","affiliation":[{"name":"Johns Hopkins School of Medicine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Phuoc T.","family":"Tran","sequence":"additional","affiliation":[{"name":"University of Maryland School of Medicine"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ken Kang-Hsin","family":"Wang","sequence":"additional","affiliation":[{"name":"University of Texas Southwestern Medical Center"},{"name":"Johns Hopkins School of Medicine"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2024,7,9]]},"reference":[{"key":"boe-15-8-4525-R1","doi-asserted-by":"publisher","first-page":"209","DOI":"10.3322\/caac.21660","volume":"71","author":"Sung","year":"2021","journal-title":"Ca-Cancer J. 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