Radiation, Volume 4, Issue 3 (September 2024) – 2 articles

Aim: To evaluate patient satisfaction outcomes with respect to pain, discomfort, and quality of life with hematology/oncology referrals undergoing CT-guided bone marrow biopsy and compare these scores with those of patients undergoing in-office biopsy. Methods: A retrospective chart review was performed over 2 years with all patients who underwent CT-guided bone marrow biopsy at our university set-up. Age, gender, BMI, radiation dose (CTDI/DLP), number of in-office biopsies, number of CT-guided biopsies, type/amount of moderate sedation used, technical and pathologic success rates, and complication rates were recorded. All patients who underwent both in-office and CT-guided biopsy were contacted by telephone to answer a brief survey regarding pain, discomfort, quality of life, and future preference with respect to each biopsy. Results: A total of 32 patients underwent CT-guided bone marrow biopsy. Moderate sedation was utilized for all CT patients, and 19 patients underwent both in-office and CT-guided biopsies. Upon surveying the 19 patients who underwent both kinds of biopsies, on a scale of 1–10 (10 = highest discomfort and highest pain), the patients on an average reported 7.8 for in-office vs. 2.1 for CT for the discomfort level (p < 0.001) and 7.9 vs. 1.7 for the pain (p < 0.001). The patients reported an average quality-of-life score of 82 (out of a scale of 100) after CT procedures and 53 for in-office (p < 0.001). All patients reported that they would prefer CT-guided procedures with sedation versus in-office procedures in the future. Conclusion: CT-guided bone marrow biopsy is the preferred and more comfortable procedure, especially in low-pain-tolerant patients, although it involves more cost, conscious sedation, and radiation exposure. Full article

Current radiation dosimeters sometimes face accuracy limitations or provide only cumulative doses over long periods. To contribute to this area, we developed a portable monitor that measures the energy spectrum and dose of gamma rays in real time. To achieve this, we used an improved sequential Bayesian estimation algorithm. The dose rate was then derived from the energy spectrum by applying a flux-to-dose conversion coefficient. The monitor consists mainly of a CsI(Tl) scintillator and a multi-pixel photon counter (MPPC). In developing this device, we focused on striking a balance between measurement accuracy, ease of use, and portability. As an essential aspect of the research, we investigated the influence of the CsI(Tl) crystal size on the performance of the monitor to determine an optimal size. This was accomplished by calculating the detection efficiency and energy resolution through experimental measurements using standard gamma-ray sources and simulations using MCNP5. Within the scope of the research, detector response functions were created for each crystal size for an energy range of 10 keV to 3 MeV. Considering an optimal balance of detection efficiency and energy resolution alongside a compact size suitable for portable applications, the crystal measuring 2.6 × 2.6 × 1.3 cm³ was deemed preferable. Full article