Publications by authors named "Yen Chou"
Article Synopsis
- Tumor imaging is essential for cancer diagnosis and treatment, especially for accurately detecting and segmenting liver lesions, which is often a challenging and variable process.
- The study aims to assess an AI model called ScaleNAS for detecting and segmenting liver lesions on CT scans, comparing its performance to human radiologists and evaluating its effectiveness on various datasets including internal and publicly available data.
- The methods involved analyzing a large dataset from Columbia University and clinical trials, with the reference standard created through expert annotation and consensus, leading to both internal and external testing of the AI's performance on liver lesions specifically.
Purpose: To assess the reproducibility of radiomic features (RFs) extracted from dynamic contrast-enhanced computed tomography (DCE-CT) scans of patients diagnosed with hepatocellular carcinoma (HCC) with regards to inter-observer variability and acquisition timing after contrast injection. The predictive ability of reproducible RFs for differentiating between the degrees of HCC differentiation is also investigated.
Methods: We analyzed a set of DCE-CT scans of 39 patients diagnosed with HCC.
Contrast-enhanced computed tomography scans (CECT) are routinely used in the evaluation of different clinical scenarios, including the detection and characterization of hepatocellular carcinoma (HCC). Quantitative medical image analysis has been an exponentially growing scientific field. A number of studies reported on the effects of variations in the contrast enhancement phase on the reproducibility of quantitative imaging features extracted from CT scans.
View Article and Find Full Text PDFBackground: Right-sided ligamentum teres (RSLT) is often associated with portal venous anomalies (PVA) and is regarded as a concerning feature for hepatobiliary intervention. Most studies consider RSLT to be one of the causes of left-sided gallbladder (LGB), leading to the hypothesis that LGB must always be present with RSLT. However, some cases have shown that right-sided gallbladder (RGB) can also be present in livers with RSLT.
View Article and Find Full Text PDFArticle Synopsis
- The study focuses on predicting the treatment response in patients with locally advanced rectal cancer (LARC) using radiomic features from pre-treatment MRIs, potentially allowing some patients to avoid surgery if they achieve a pathological complete response (pCR).
- Researchers analyzed MRI data from 133 LARC patients, extracting 1,223 radiomic features and identifying key predictors of pCR using advanced statistical methods like Lasso regression.
- The results showed that specific image-derived features, particularly texture characteristics, demonstrated strong predictive power, achieving an area under the receiver operating characteristic (AUROC) score of 0.86 for classification accuracy.
Article Synopsis
- The iliopsoas plane (IP) is a fascia layer located under the iliopsoas muscle complex and is being explored for new ultrasound-guided pain relief methods for hips.
- A study using pelvic MR images from 49 adult Eastern Asians showed specific measurements for the IP, including its width (10.7 mm), depth (48.5 mm), and needle-beam angle (84.2 degrees).
- The findings highlighted age-related differences in IP width, particularly that older patients had wider planes, which could help improve techniques for hip pain management using ultrasound-guided interventions.
Iliopsoas plane (IP) is a fascial plane deep to the iliopsoas complex that can serve as a potential space for the injection of local anesthetics to selectively block the articular branches of femoral nerve and accessory obturator nerve to the anterior hip capsule. Two highly similar ultrasound-guided interfascial plane blocks that target the IP, pericapsular nerve group (PENG) block and iliopsoas plane block (IPB), were both designed to achieve motor-sparing sensory block to the anterior hip capsule. However, the most recent evidence shows that PENG block can cause 25% or more of quadriceps weakness, while IPB remains the hip block that can preserve quadriceps strength.
View Article and Find Full Text PDFBackground: The performance of chest radiography-based age and sex prediction has not been well validated. We used a deep learning model to predict the age and sex of healthy adults based on chest radiographs (CXRs).
Methods: In this retrospective study, 66,643 CXRs of 47,060 healthy adults were used for model training and testing.
Background: Due to the lack of an evidence-based consensus, managing refractory myofascial pain syndrome is challenging for clinicians. Dextrose injection (dextrose prolotherapy) emerged as a promising, cost-effective treatment. This study evaluated the efficacy of targeted ultrasound-guided dextrose injection for localized myofascial pain syndrome.
View Article and Find Full Text PDFHepatic arterial pseudoaneurysm is a rare but potentially fatal condition that requires prompt management. We report a case of hepatic arterial pseudoaneurysm developed after radiofrequency ablation of a hepatocellular carcinoma. The patient was successfully treated with percutaneous absolute ethanol injection under ultrasound guidance.
View Article and Find Full Text PDFTubo-ovarian abscess caused by Morganella morganii is unusual. A 54-year-old menopausal woman visited the emergency room with lower abdominal pain, vomiting, and fever for 4 days. Pelvic examination revealed lifting tenderness over the right adnexum without motion tenderness of the uterus.
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