2026 CAP Congress / Congrès de l'ACP 2026

Session

(DPMB) M3-10

M3-10

22 Jun 2026, 16:15

U. Ottawa - Learning Crossroads (CRX) Building

538. Optical Biomodulation Without Optogenetics

Seyed Masoumi Lari (York University)

22/06/2026, 16:15

Physics in Medicine and Biology / Physique en médecine et en biologie (DPMB-DPMB)

Oral Competition (Undergraduate Student) / Compétition orale (Étudiant(e) du 1er cycle)

Cellular behaviour modulation has traditionally been studied through genetic and epigenetic manipulation. However, non-genetic approaches to control behaviour remain mostly underexplored. We demonstrate here, for the first time, the use of membrane-incorporated molecular photo switches, in the form of azobenzene-cholesterol derivatives, to optically control cellular behavioural processes in...

614. Towards Non-invasive Assessment of Tissue Stiffness Using Diffuse Correlation and Time-resolved Near-infrared Spectroscopy

Emma Zhang

22/06/2026, 16:30

Physics in Medicine and Biology / Physique en médecine et en biologie (DPMB-DPMB)

Oral Competition (Undergraduate Student) / Compétition orale (Étudiant(e) du 1er cycle)

Introduction: Brain tissue stiffness has emerged as a promising biomarker for early diagnosis of neurodegenerative changes. Diffuse Correlation Spectroscopy (DCS) has the potential to estimate tissue stiffness non-invasively, as the decorrelation time of scattered light speckles (Tau 2) correlates with Young’s Modulus. While decorrelation time is dominated by dynamic scatterers, Tau 2 in...

772. Characterization of Radiochromic PCDA Formulations for Real-time Photon and Proton Dosimetry

Rohith Kaiyum

22/06/2026, 16:45

Physics in Medicine and Biology / Physique en médecine et en biologie (DPMB-DPMB)

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle)

Pentacosa-10,12-diynoic acid (PCDA) and its Li salts are used in clinical radiotherapy across a broad range of modalities. The underlying chemical and structural characteristics of these materials however remain poorly understood within the medical physics community. In this work we systematically evaluate the real-time dosimetric performance of three PCDA-based radiochromic formulations,...

688. Development and Validation of a Wearable, Low-Cost Near-Infrared Spectroscopy System for Cerebral Hemodynamic Monitoring

Saeed Samaei (University of Western Ontario)

22/06/2026, 17:00

Physics in Medicine and Biology / Physique en médecine et en biologie (DPMB-DPMB)

Oral (Non-Student) / Orale (non-étudiant(e))

Access to brain monitoring technologies remains a critical need in low-income countries, where neonatal brain injury contributes substantially to permanent neurological impairment and mortality. To address this challenge, we introduced a low-cost, wearable near-infrared spectroscopy (NIRS) device developed by repurposing a commercially available optical biosensing evaluation module...

912. The effect of skin tone on the sensitivity of infrared optical technologies

Dr Kayrel Edwards (York University, Department of Physics and Astronomy)

22/06/2026, 17:15

Physics in Medicine and Biology / Physique en médecine et en biologie (DPMB-DPMB)

Oral (Non-Student) / Orale (non-étudiant(e))

Melanin pigment determines skin tone, where darker skin tones contain higher levels of melanin content. To examine the sensitivity of infrared optical technologies as a function of skin tone, 5 commercial pulse and cerebral oximeters were investigated on participants with varying skin tone (Brands: Masimo MightySat™, Blue Echo Care™, ToronTek-G64™, Apple Watch Series 10™, and NIRSport2™). The...