Publications by authors named "Chui Mei Tiu"

The outbreak of the SARS-CoV-2 infection, also known as coronavirus disease 2019 (COVID-19), was formally defined a pandemic by the World Health Organization (WHO) in March 2020, and is still a global health issue. Since there is a high prevalence of acute cardiac injury in patients with COVID-19 infection, point-of-care cardiac ultrasound (PoCCUS) may be used for longitudinal monitoring of patients infected with COVID-19. However, there is still limited experience on the application of PoCCUS in the COVID-19 pandemic.

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Background: The purpose of this study was to report the safety of perfluorobutane (Sonazoid) as a vascular-phase imaging agent in characterizing focal liver lesions (FLLs).

Materials And Methods: From May 2014 to April 2015, a total of 54 individuals who received Sonazoid contrast-enhanced ultrasound (CEUS) were enrolled at 5 hospitals of 4 medical centers. All individuals were included in safety evaluation.

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Hepatic 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.

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Choledochal cysts rarely present with acute pancreatitis. We report a patient with type I choledochal cyst(s) who had concomitant acute frank hemorrhagic pancreatitis. A 14-year-old male noted with a history of recurrent abdominal pain, fever and jaundice.

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Renal cysts are common incidental findings in clinical practice. Most renal cysts detected in medical imaging are benign simple cysts. However, some are complicated by hemorrhage or infection or are associated with calcification.

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Ultrasound is a frequently used diagnostic tool for gallbladder diseases. Polypoid lesions are commonly depicted at routine abdominal ultrasonography (US). The characteristics of these lesions vary.

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Synovial chondromatosis is a rare, benign, proliferative cartilaginous lesion arising from the synovial tissue, tenosynovium, or bursal lining. We describe the case of a patient who initially presented with multiple axillary masses. Breast ultrasound (US) was requested due to the concern of a breast tumor with axillary lymph node metastases.

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Elephantiasis is a condition featured by gross enlargement of body parts to massive proportions. Neurofibromatosis type 1 (NF1) is a multisystem genetic disorder. Vascular anomaly is one among the complications of NF1.

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Background: Patients with the later-onset IVS4+919G>A (IVS4) Fabry mutation are known to have positive central nervous system involvement compared with age- and sex-matched controls. This study compares central nervous system manifestations in patients with the IVS4 mutation or classical Fabry mutations.

Methods: This was a retrospective analysis of magnetic resonance imaging (MRI) data from Taiwanese patients enrolled in the Fabry Outcome Survey (sponsored by Shire; data extracted March 2015).

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Purpose: This study aims to evaluate patients with right-sided colonic diverticulitis detected at ultrasonography (US).

Methods: We retrospectively analyzed 14 patients. Demographic data, clinical features, and US images were documented.

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Solitary fibrous tumor (SFT) is an uncommon neoplasm of mesenchymal origin, which can be benign or malignant. Most SFTs develop from the pleura, but they can also be found in other sites. There are only few reports of SFT occurring in the breast.

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This paper performs a comprehensive study on the deep-learning-based computer-aided diagnosis (CADx) for the differential diagnosis of benign and malignant nodules/lesions by avoiding the potential errors caused by inaccurate image processing results (e.g., boundary segmentation), as well as the classification bias resulting from a less robust feature set, as involved in most conventional CADx algorithms.

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Epidermoid cysts are rare. They represent the most common benign tumor of the testis. The sonographic appearances of testicular epidermoid cysts usually include avascular, mostly lamellated, heterogeneous internal echotexture, with hypoechoic and hyperechoic concentric rings, accounting for the typical onion-ring appearance.

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Purpose: Generally speaking, breast imaging experts and physicians select a representative slice from the strain elastographic image sequences to diagnose the tumor. Given the strain image qualities, it is difficult to make a successful diagnosis using human eyes only. The main purpose of this study is to develop an automatic and reliable method to select the representative slice from the elastography cine loops and/or video and then diagnose the tumor by means of the elastographic features generated from the selected slice.

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We herein describe a patient with segmental pulmonary artery transection after blunt trauma, which was diagnosed preoperatively by computed tomography. Bolus tracking contrast-enhanced computed tomography clearly depicted both aortic and pulmonary vasculatures. A one-step examination quickly disclosed aortic damage and injury to significant visceral organs.

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Microcalcifications are frequently associated with papillary thyroid cancers. Metastatic nodules from extrathyroid malignancies may mimic primary thyroid neoplasm on sonography, but do not present with microcalcifications. We report the case of a 45-year-old woman with a history of invasive ductal carcinomas of bilateral breasts, status post surgery and neoadjuvant chemotherapy.

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Cardiac fibromas (CFs) are benign primary tumors that typically occur during childhood and may be asymptomatic. However, due to the proximity of CFs to the cardiac structure, significant morbidity and mortality may also be anticipated. CFs do not show spontaneous regression and surgical resection generally remains the treatment of choice for these tumors in children.

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In recent studies, both tumor morphology and vascularity played an important role in differentiating breast tumors. In this article, a computer-aided diagnosis (CAD) system was proposed to quantify the tumor morphology of vascularity on three-dimensional (3-D) power Doppler breast ultrasound (PDUS) images. We segmented the tumor margin by the level set method and skeletonized vessels by the 3-D thinning algorithm from 3-D PDUS data to capture the B-mode and vascularity features.

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Background: The Tanner-Whitehouse (TW) method is one of the well-known techniques in determining the bone age.

Objective: According to the objectivity of TW3, the secular trend was investigated to discover whether the skeletal maturation of Taiwanese children between two generations was different.

Subjects And Methods: The large-scale database of Taiwan was collected.

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Background: Metaplastic carcinoma of the breast (MPCB) is a rare breast cancer. We reviewed sonographic findings for MPCB.

Methods: Grayscale ultrasonography (US), color Doppler US (CDUS), and spectral Doppler US (SDUS) findings for 10 patients with MPCB breast were retrospectively reviewed.

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An 8-year-old girl with Williams syndrome was found to have a heart murmur. Cardiac CT demonstrated a Valsalva sinus aneurysm (VSA) of the non-coronary cuspid, with left atrium (LA) indentation, resembling the face of Cyclops on a coronal reformatted image. Williams syndrome is related to some congenital disorders with interruption of the tunica media from the aortic root to the annular fibrous ring or aortic valve.

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Rationale And Objectives: To assess the necessity of intravenous contrast medium for abdominopelvic computed tomography (CT) diagnosis of acute appendicitis (APP) among adult patients with right lower quadrant (RLQ) abdominal pain at emergency department (ED).

Materials And Methods: ED patients with clinical suspicion of APP from RLQ pain for a period of 8 months were enrolled retrospectively. Both pre- and postintravenous contrast-enhanced CT scans were performed for these patients.

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Purpose: A probabilistic image segmentation algorithm called stochastic region competition is proposed for performing Doppler sonography segmentation.

Methods: The image segmentation is conducted by maximizing a posteriori that models histogram likelihood, gradient likelihood, and a spatial prior. The optimization is done by a modified expectation and maximization (EM) method that aims to improve computation efficiency and avoid local optima.

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Background: Carpal angle measurement is one of the anthropometrical methods to evaluate the maturation of children.

Objective: To discuss the relationship between bone age and carpal angle in the maturation of children of two different generations.

Subjects And Methods: The first group (mid-1960s group) includes 521 Taiwanese children, 196 boys and 325 girls, growing during the agricultural period (between 1966 and 1967).

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