Role of blood oxygenation saturation in ovarian cancer diagnosis using multi-spectral photoacoustic tomography.

Abstract:

:In photoacoustic tomography (PAT), a tunable laser typically illuminates the tissue at multiple wavelengths, and the received photoacoustic waves are used to form functional images of relative total haemoglobin (rHbT) and blood oxygenation saturation (%sO2 ). Due to measurement errors, the estimation of these parameters can be challenging, especially in clinical studies. In this study, we use a multi-pixel method to smooth the measurements before calculating rHbT and %sO2 . We first perform phantom studies using blood tubes of calibrated %sO2 to evaluate the accuracy of our %sO2 estimation. We conclude by presenting diagnostic results from PAT of 33 patients with 51 ovarian masses imaged by our co-registered PAT and ultrasound system. The ovarian masses were divided into malignant and benign/normal groups. Functional maps of rHbT and %sO2 and their histograms as well as spectral features were calculated using the PAT data from all ovaries in these two groups. Support vector machine models were trained on different combinations of the significant features. The area under ROC (AUC) of 0.93 (0.95%CI: 0.90-0.96) on the testing data set was achieved by combining mean %sO2 , a spectral feature, and the score of the study radiologist.

journal_name

J Biophotonics

journal_title

Journal of biophotonics

authors

Amidi E,Yang G,Uddin KMS,Luo H,Middleton W,Powell M,Siegel C,Zhu Q

doi

10.1002/jbio.202000368

subject

Has Abstract

pub_date

2020-12-30 00:00:00

pages

e202000368

eissn

1864-063X

issn

1864-0648

pub_type

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