Comparative study between Pap smear cytology and FTIR spectroscopy: a new tool for screening for cervical cancer

To evaluate Fourier transform infrared (FTIR) spectroscopy as new tool for screening of cervical cancer in comparison with cervical cytology. A total of 800 cervical scrapings were taken by cytobrush and placed in Thin Prep medium. The samples were dried over infrared transparent matrix. Beams of infrared light were directed at the dried samples at frequency of 4000 to 400cm-1. The absorption data were produced using a Spectrum BX II FTIR spectrometer. Data were compared with the reference absorption data of known samples using FTIR spectroscopy software. FTIR spectroscopy was compared with cytology (gold standard). FTIR spectroscopy could differentiate normal from abnormal cervical cells in the samples examined. The sensitivity was 85%, specificity 91%, positive predictive value 19.5% and negative predictive value of 99.5%. This study suggests that FTIR spectroscopy could be used as an alternative method for screening for cervical cancer