Clinical assessment of a low-cost, hand-held, smartphone-attached intraoral imaging probe for 5-aminolevulinic acid photodynamic therapy monitoring and guidance

India has one of the highest rates of oral squamous cell carcinoma (OSCC) in the world, with an incidence of 15 per 100,000 and more than 70,000 deaths per year. The problem is exacerbated by a lack of medical infrastructure and routine screening, especially in rural areas. New technologies for oral...

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Veröffentlicht in:Journal of biomedical optics 2023-08, Vol.28 (8), p.082809
Hauptverfasser: Khan, Shakir, Song, Bofan, Mallidi, Srivalleesha, Li, Shaobai, Liu, Hui, Bilal Hussain, M A, Siddiqui, Shaista, Khan, Amjad P, Akhtar, Kafil, Siddiqui, Shahid Ali, Hasan, Syed Abrar, Hopper, Colin, Bown, Stephen G, Liang, Rongguang, Hasan, Tayyaba, Celli, Jonathan P
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container_issue 8
container_start_page 082809
container_title Journal of biomedical optics
container_volume 28
creator Khan, Shakir
Song, Bofan
Mallidi, Srivalleesha
Li, Shaobai
Liu, Hui
Bilal Hussain, M A
Siddiqui, Shaista
Khan, Amjad P
Akhtar, Kafil
Siddiqui, Shahid Ali
Hasan, Syed Abrar
Hopper, Colin
Bown, Stephen G
Liang, Rongguang
Hasan, Tayyaba
Celli, Jonathan P
description India has one of the highest rates of oral squamous cell carcinoma (OSCC) in the world, with an incidence of 15 per 100,000 and more than 70,000 deaths per year. The problem is exacerbated by a lack of medical infrastructure and routine screening, especially in rural areas. New technologies for oral cancer detection and timely treatment at the point of care are urgently needed. Our study aimed to use a hand-held smartphone-coupled intraoral imaging device, previously investigated for autofluorescence (auto-FL) diagnostics adapted here for treatment guidance and monitoring photodynamic therapy (PDT) using 5-aminolevulinic acid (ALA)-induced protoporphyrin IX (PpIX) fluorescence (FL). A total of 12 patients with 14 buccal mucosal lesions having moderately/well-differentiated micro-invasive OSCC lesions ( diameter and depth) were systemically (in oral solution) administered three doses of ALA (total ). Lesion site PpIX and auto-FL were imaged using the multichannel FL and polarized white-light oral cancer imaging probe before/after ALA administration and after light delivery (fractionated, total of 635 nm red LED light). The handheld device was conducive for access to lesion site images in the oral cavity. Segmentation of ratiometric images in which PpIX FL is mapped relative to auto-FL enabled improved demarcation of lesion boundaries relative to PpIX alone. A relative FL ( -value) threshold of 1.4 was found to segment lesion site PpIX production among the patients with mild to severe dysplasia malignancy. The segmented lesion size is well correlated with ultrasound findings. Lesions for which -value was at the time of treatment were associated with successful outcomes. These results indicate the utility of a low-cost, handheld intraoral imaging probe for image-guided PDT and treatment monitoring while also laying the groundwork for an integrated approach, combining cancer screening and treatment with the same hardware.
doi_str_mv 10.1117/1.JBO.28.8.082809
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The handheld device was conducive for access to lesion site images in the oral cavity. Segmentation of ratiometric images in which PpIX FL is mapped relative to auto-FL enabled improved demarcation of lesion boundaries relative to PpIX alone. A relative FL ( -value) threshold of 1.4 was found to segment lesion site PpIX production among the patients with mild to severe dysplasia malignancy. The segmented lesion size is well correlated with ultrasound findings. Lesions for which -value was at the time of treatment were associated with successful outcomes. 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language eng
recordid cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_10362156
source MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; TestCollectionTL3OpenAccess; ProQuest Central UK/Ireland; PubMed Central; ProQuest Central
subjects Aminolevulinic acid
Aminolevulinic Acid - therapeutic use
Cameras
Cancer
Cancer screening
Cancer therapies
Carcinoma, Squamous Cell
Dysplasia
Fluorescence
Health services
Humans
Image processing
Image segmentation
Lesions
Light emitting diodes
Low cost
Malignancy
Medical imaging
Medical screening
Monitoring
Mouth Neoplasms - pathology
New technology
Oral cancer
Oral carcinoma
Oral cavity
Oral squamous cell carcinoma
Patients
Photochemotherapy - methods
Photodynamic therapy
Photosensitizing Agents - therapeutic use
Protoporphyrin
Protoporphyrin IX
Protoporphyrins - metabolism
Rural areas
Smartphone
Smartphones
Special Section on Seeing Inside Tissue with Optical Molecular Probes
Telemedicine
White light
title Clinical assessment of a low-cost, hand-held, smartphone-attached intraoral imaging probe for 5-aminolevulinic acid photodynamic therapy monitoring and guidance
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