Christopher F. Njeh, PhD

Shortages of trained medical physicists persist across Africa. Needs-assessment surveys were utilized to determine trainee interest and medical physics curricular gaps to aid in design of hands-on outreach workshops for the African School of Physics, a severa...

Standard dose optimization fails in low-resource settings due to unique patient phenotypes, heterogeneous aging equipment, and absent validation pathways. This work presents a closed-loop digital twin ecosystem that autonomously synthesizes institution-specif...

Access to radiation therapy remains a major challenge in many low‑ and middle‑income countries (LMICs), where limited infrastructure and workforce shortages hinder timely cancer treatment. Moi Teaching and Referral Hospital (MTRH) in Eldoret, Kenya, is an Aca...

Hypertensive heart disease in Africa progresses as a silent epidemic of myocardial fibrosis, undetectable by conventional echocardiography until irreversible failure. This study hypothesized that early fibrosis manifests as a perturbation in ultrasonic scatte...

This study investigates the hematological consequences of chronic low-dose radiation exposure (0.1–20 mSv/year) among radiology professionals, assessing profession-specific vulnerabilities and identifying biomarkers for early biological impact below regulator...

Accurate segmentation of the left anterior descending (LAD) coronary artery is essential for cardiac sparing in thoracic radiotherapy, particularly for lung cancer patients receiving high-dose radiation near the heart. However, the LAD is thin, low-contrast,...