{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,26]],"date-time":"2026-08-26T16:22:09Z","timestamp":1787761329863,"version":"build-2784847793"},"reference-count":33,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"4","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2022,10]]},"abstract":"<jats:sec>\n                    <jats:title>Purpose:<\/jats:title>\n                    <jats:p>\n                      The application of radiotherapy to the treatment of cancer requires the knowledge of photon interaction coefficients such as mass attenuation (\u03bc\n                      <jats:sub>m<\/jats:sub>\n                      ) and mass energy-absorption coefficients (\u03bc\n                      <jats:sub>en<\/jats:sub>\n                      \/\u03c1). Although these coefficients have been determined for different tissues, it is lacking for the colorectal cancer (CRC) tissue in the literature. This study determines the \u03bc\n                      <jats:sub>m<\/jats:sub>\n                      and \u03bc\n                      <jats:sub>en<\/jats:sub>\n                      \/\u03c1 for the CRC tissue within the radiotherapy energy range.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Materials and Methods:<\/jats:title>\n                    <jats:p>\n                      The CRC tissue from autopsy patients was freeze-dried, grounded into a fine powder, and made into pellets of 1 cm thickness. The elements detected in the CRC tissue using Rutherford backscattering spectrometry were used in XCOM to determine the theoretical values of \u03bc\n                      <jats:sub>m<\/jats:sub>\n                      and \u03bc\n                      <jats:sub>en<\/jats:sub>\n                      \/\u03c1. The CRC tissue was again exposed to X-rays of energies of 6 and 15MV, respectively, to determine its experimental values of \u03bc\n                      <jats:sub>m<\/jats:sub>\n                      and \u03bc\n                      <jats:sub>en<\/jats:sub>\n                      \/\u03c1.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>Elements detected included carbon, oxygen and nitrogen making up 96.67%, high atomic number and trace elements making up the remaining 3.33% fraction of the CRC tissue.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>\n                      The theoretical and experimental \u03bc\n                      <jats:sub>m<\/jats:sub>\n                      and \u03bc\n                      <jats:sub>en<\/jats:sub>\n                      \/\u03c1 values showed a good agreement of about 2% difference between them. These values can be used to simulate the CRC tissue with respect to \u03bc\n                      <jats:sub>m<\/jats:sub>\n                      and \u03bc\n                      <jats:sub>en<\/jats:sub>\n                      \/\u03c1.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.4103\/jmp.jmp_29_22","type":"journal-article","created":{"date-parts":[[2023,1,10]],"date-time":"2023-01-10T02:42:19Z","timestamp":1673318539000},"page":"381-386","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":2,"title":["Photon Interaction Coefficients for the Colorectal Cancer Tissue"],"prefix":"10.4103","volume":"47","author":[{"given":"Emmanuel Okon","family":"Esien-Umo","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Joseph Abebe","family":"Obu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ndubuisi 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