GPU-enabled design of an adaptable pattern recognition system for discriminating squamous intraepithelial lesions of the cervix

2020 ◽  
Vol 65 (3) ◽  
pp. 315-325
Author(s):  
Christos Konstandinou ◽  
Spiros Kostopoulos ◽  
Dimitris Glotsos ◽  
Dimitra Pappa ◽  
Panagiota Ravazoula ◽  
...  

AbstractThe aim of the present study was to design an adaptable pattern recognition (PR) system to discriminate low- from high-grade squamous intraepithelial lesions (LSIL and HSIL, respectively) of the cervix using microscopy images of hematoxylin and eosin (H&E)-stained biopsy material from two different medical centers. Clinical material comprised H&E-stained biopsies of 66 patients diagnosed with LSIL (34 cases) or HSIL (32 cases). Regions of interest were selected from each patient’s digitized microscopy images. Seventy-seven features were generated, regarding the texture, morphology and spatial distribution of nuclei. The probabilistic neural network (PNN) classifier, the exhaustive search feature selection method, the leave-one-out (LOO) and the bootstrap validation methods were used to design the PR system and to assess its precision. Optimal PR system design and evaluation were made feasible by the employment of graphics processing unit (GPU) and Compute Unified Device Architecture (CUDA) technologies. The accuracy of the PR-system was 93% and 88.6% when using the LOO and bootstrap validation methods, respectively. The proposed PR system for discriminating LSIL from HSIL of the cervix was designed to operate in a clinical environment, having the capability of being redesigned when new verified cases are added to its repository and when data from other medical centers are included, following similar biopsy material preparation procedures.

2018 ◽  
Vol 2 (S1) ◽  
pp. e000136
Author(s):  
Suhana Jotva ◽  
Hemani Desai ◽  
Hansa Goswami

Aims and Objectives: The aim of present study is to estimate the frequency of abnormal PAP’s smears and mainly to detect precancerous and cancerous lesions as well as inflammatory lesions in HIV infected women. Methodology: Our study was a retrospective study of total 130 cases and PAP’s smears were examined in cytology section in Department of Pathology, BJ Medical College, Ahmedabad from 1st March 2017 to 31st August 2017. Both HIV positive and HIV negative patients were included in the study. 80 patients were HIV negative and 50 patients were HIV positive. The clinical history and relevant parameters were noted. All the smears were processed by a conventional method using Papanicolaou stain.  Results: Out of 130 cases, 118 cases were reported negative for intraepithelial lesions or malignancy (NILM). Five cases were positive for squamous intraepithelial lesions (SIL) out of which four were HIV positive. Seven cases were of atypical squamous cells of undetermined significance (ASCUS) out of which 5 were HIV positive. Three cases were showing bacterial vaginosis. 1 case was showing Trichomonas Vaginalis. 19 cases were showing changes of non-specific inflammation. 6 cases were showing atrophic changes.  Conclusion: HIV infected women are at more risk to develop cervical cytological abnormalities. The study revealed a maximum number of non-specific inflammatory smears followed by smears showing atrophic changes. Smears suspicious for malignancy (ASCUS) and smears showing squamous intraepithelial lesions (SIL) were more common in HIV positive patients. Thus regular PAP’s smears screening as recommended by National AIDS Control Organization (NACO) will help in early detection of cervical abnormalities in HIV positive women. 


Author(s):  
N.A. Shmakova ◽  
G.N. Chistyakova ◽  
I.N. Kononova ◽  
I.I. Remizova

Recently, there has been a steady growth of cervical cancer all over the world, especially in Russia. Patients with cervical cancer have become much younger. At the same time, the human papillomavirus is not only the main factor in the neoplastic process, but it is also one of the most common sexually transmitted infections in the world. The aim of the paper is to assess the prevalence and characteristics of human papillomavirus genotypes in patients with cervical intraepithelial neoplasia. Materials and Methods. During the periodic screening we examined 213 women of a reproductive age with HPV infection. All patients underwent liquid-based cytology and human papillomavirus genotyping by polymerase chain reaction. Results. We revealed that the prevalence of cervical intraepithelial neoplasia among women with papillomavirus infection was 80.3 % (n=171). According to human papillomavirus genotyping, HPV 16 (38 %) and HPV 33 (32 %) prevailed. We also observed positive high correlation between high-grade squamous intraepithelial lesions (HSIL) and HPV 18 (r=+0.759, p=0.001), a negative mean correlation between HPV 45 and low-grade squamous intraepithelial lesions (LSIL) (r=-0.643, p=0.002). A cohort of patients with severe intraepithelial cervical lesions demonstrated high viral load rates. Conclusion. According to the results obtained, we established the dominance of HPV 16 and HPV 33 genotypes in cervical intraepithelial neoplasia. There were significant differences between HSIL and LSIL patients with HPV 18 and HPV 45. There was also a correlation between an increase in the viral load with the severity of the pathological process. Keywords: human papillomavirus, intraepithelial cervical neoplasms, cervical cancer. В последние годы в мире, особенно в России, наблюдается неуклонный рост и «омолаживание» рака шейки матки. При этом вирус папилломы человека является не только основным фактором прогрессирования неопластического процесса, но и одной из наиболее распространенных инфекций, предаваемых половым путем, в мире. Цель. Оценить распространенность и характеристику генотипов папилломавирусной инфекции у пациенток с цервикальными интраэпителиальными неоплазиями. Материалы и методы. Проведено обследование 213 пациенток репродуктивного возраста с ВПЧ-инфекцией, пришедших на профилактический осмотр. Всем женщинам было выполнено цитологическое исследование жидкостным методом и генотипирование вируса папилломы человека методом полимеразной цепной реакции. Результаты. Распространенность цервикальных интраэпителиальных неоплазий среди женщин с папилломавирусной инфекцией составила 80,3 % (171 пациентка). Согласно данным генотипирования вируса папилломы человека превалировал 16-й (38 %) и 33-й типы (32 %). Выявлена положительная высокая корреляционная связь между цервикальными неоплазиями высокой степени онкогенного риска (HSIL) и 18-м типом ВПЧ-инфекции (r=+0,759 при р=0,001), отрицательная средняя корреляционная связь 45-го типа ВПЧ с низкой степенью онкогенного риска (LSIL) (r=-0,643 при р=0,002). Продемонстрированы высокие показатели вирусной нагрузки в когорте пациенток с тяжелыми внутриэпителиальными цервикальными поражениями. Выводы. По результатам полученных данных установлено доминирование 16-го и 33-го генотипов ВПЧ при цервикальных интраэпителиальных неоплазиях с наличием значимых различий между пациентами с HSIL и LSIL в отношении 18-го и 45-го типов, а также связь роста уровня вирусной нагрузки с увеличением степени тяжести патологического процесса. Ключевые слова: вирус папилломы человека, интраэпителиальные новообразования шейки матки, рак шейки матки.


2007 ◽  
Vol 86 (1) ◽  
pp. 94-98 ◽  
Author(s):  
José Eleutério Jr ◽  
Paulo César Giraldo ◽  
Ana Katherine Gonçalves ◽  
Diane Isabelle Magno Cavalcante ◽  
Francisco Valdeci de Almeida Ferreira ◽  
...  

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