Hypoechoic versus hypervascular lesion in the diagnosis of prostatic carcinoma

Ebeid, Annelize; Elshamy, Ahmed

doi:10.1016/j.afju.2018.01.004

Cited by 4 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, gray scale ultrasound may sometimes portray early stage carcinoma as isoechoic. This results with the carcinoma appearing similar to surrounding healthy tissue, with no clear distinction (Porter and Banerji, 2016 ; Ebeid and Elshamy, 2018 ).…”

Section: Introductionmentioning

confidence: 98%

Electrical Impedance Tomography for Robot-Aided Internal Radiation Therapy

Tan

Rossa

2021

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

High dose rate brachytherapy (HDR) is an internal based radiation treatment for prostate cancer. The treatment can deliver radiation to the site of dominant tumor growth within the prostate. Imaging methods to delineate the dominant tumor are imperative to ensure the maximum success of HDR. This paper investigates the feasibility of using electrical impedance tomography (EIT) as the main imaging modality during robot-aided internal radiation therapy. A procedure utilizing brachytherapy needles in order to perform EIT for the purpose of robot-aided prostate cancer imaging is proposed. It is known that cancerous tissue exhibits different conductivity than healthy tissue. Using this information, it is hypothesized that a conductivity map of the tissue can be used to locate and delineate cancerous nodules via EIT. Multiple experiments were conducted using eight brachytherapy needle electrodes. Observations indicate that the imaging procedure is able to observe differences in tissue conductivity in a setting that approximates transperineal HDR and confirm that brachytherapy needles can be used as electrodes for this purpose. The needles can access the tissue at a specific depth that traditional EIT surface electrodes cannot. The results indicate the feasibility of using brachytherapy needles for EIT for the purpose internal radiation therapy.

show abstract

Section: Introductionmentioning

confidence: 98%

Electrical Impedance Tomography for Robot-Aided Internal Radiation Therapy

Tan

Rossa

2021

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…US imaging can be used to do so only when the lesion is visible in the US images. However, lesions typically appear as a hypoechoic region, i.e., does not reflect US waves and appears darker than the surrounding tissue, in grey scale US, but can also appear as an isoechoic region, i.e., does reflect US waves and appears brighter than the surrounding tissue, in up to 30% of cases [25]. Since there is no guarantee that the lesion will be visible via US during the operation, a complementary imaging modality is often used to identify the lesions before the US-guided biopsy procedure.…”

Section: Targeted Biopsymentioning

confidence: 99%

Electrical Impedance Spectroscopy with Multi-modal Tissue Discrimination for Ultrasound-Guided Targeted Biopsy

McDermott

View full text Add to dashboard Cite

Prostate cancer (PCa) diagnosis has undergone a dramatic evolution in recent years.Men with clinical risk factors and important lesions observed via magnetic resonance imaging (MRI) typically undergo a targeted biopsy. In a typical prostate biopsy procedure, the operator uses ultrasound (US) imaging to place a biopsy needle in the lesion(s) identified pre-operation via MRI for sampling. Since the lesion is not always visible in US, there is no way to ascertain that the needle is correctly placed in the lesion before sampling. Thus, negative biopsy results occur often and lead to uncertainty in treatment decisions. This thesis proposes an instrumented needle probe that uses electrical impedance spectroscopy and algorithms to identify the tissue at the needle tip in real-time based on the tissue's bioelectrical properties. A new probe is designed, constructed, and validated on a collected dataset of ex-vivo tissue samples. Two data augmentation methods are proposed to improve the performance of tissue classification algorithms running on small datasets. Lastly, the thesis shows that US waves induce an electric potential in the tissue, which can be effectively measured with the sensorised needle and may provide additional information to classify the tissue. In the future, the use of the sensorised needle for tissue identification could improve confidence in biopsy results, and reduce procedure time and number of biopsies performed. i Components of Chapter 2, at time of writing, are under review as: C. McDermott, H. Asilian-Bidgoli, and C. Rossa -"Electrical impedance spectroscopy sensorized needle for prostate cancer localization during MRI-ultrasound-fused targeted biopsy",

show abstract

Development of a tissue discrimination electrode embedded surgical needle using vibro-tactile feedback derived from electric impedance spectroscopy

Kent

Rossa

2021

Med Biol Eng Comput

View full text Add to dashboard Cite

Hypoechoic versus hypervascular lesion in the diagnosis of prostatic carcinoma

Cited by 4 publications

References 12 publications

Electrical Impedance Tomography for Robot-Aided Internal Radiation Therapy

Electrical Impedance Tomography for Robot-Aided Internal Radiation Therapy

Electrical Impedance Spectroscopy with Multi-modal Tissue Discrimination for Ultrasound-Guided Targeted Biopsy

Development of a tissue discrimination electrode embedded surgical needle using vibro-tactile feedback derived from electric impedance spectroscopy

Contact Info

Product

Resources

About