Many teaching hospitals and university physics departments have a site license to NCRP reports. If you work at or are affiliated with a large institution, check your internal digital library or ask the medical physicist on staff.
As of mid-2026, the NCRP is actively working on a successor report to 147, tentatively titled "Shielding Design for Hybrid and Ultra-High-Field MRI Systems." The new document will address: ncrp 147 pdf
Radiation that escapes through the X-ray tube housing. ncrp 147 pdf
Those searching for the NCRP 147 PDF are often doing so because older designs based on Report 49 are no longer considered sufficient or cost-effective. The landscape of medical imaging changed drastically between 1976 and 2004. ncrp 147 pdf