Utilizing Deep Learning and Computed Tomography to Determine Pulmonary Nodule Activity in Patients With Nontuberculous Mycobacterial-Lung Disease.

Purpose: To develop and evaluate a deep convolutional neural network (DCNN) model for the classification of acute and chronic lung nodules from nontuberculous mycobacterial-lung disease (NTM-LD) on computed tomography (CT).

Materials And Methods: We collected a data set of 650 nodules (316 acute and 334 chronic) from the CT scans of 110 patients with NTM-LD. The data set was divided into training, validation, and test sets in a ratio of 4:1:1.

Usefulness of laboratory parameters and chest CT in the early diagnosis of COVID-19.

In the present study, the importance of laboratory parameters and CT findings in the early diagnosis of COVID-19 was investigated. To this end, 245 patients admitted between April 1st, and May 30th, 2020 with suspected COVID-19 were enrolled. The patients were divided into three groups according to chest CT findings and RT-PCR results.

Right Ventricular Blood Cyst in an Adult Autosomal Dominant Polycystic Kidney Disease Patient: An Unusual Association.

Blood cysts of the heart are unusual primary cardiac tumor-like masses, which are usually located on the cardiac valves. These are very rare in adults, especially in a non-valvular location. Autosomal-dominant polycystic kidney disease (ADPKD) typically presents with multiple bilateral renal cysts, resulting in chronic kidney disease.

The diagnostic and prognostic value of the optic nerve sheath diameter on CT for diagnosis spontaneous subarachnoid hemorrhage.

Introduction: The aim of this study was to investigate the relationship between the optic nerve sheath diameter (ONSD) measured on non-contrast head computed tomography (CT) and the diagnosis and prognosis of spontaneous subarachnoid hemorrhage (SAH) on emergency department (ED) patients.

Method: We used a matched control group of patients with the same age and gender who were diagnosed in the ED with spontaneous SAH and who admitted to the ED with headache. Four emergency medicine attending physicians made the ONSD measurements.

Dural puncture: an overlooked cause of cerebral venous thrombosis.

Cerebral venous thrombosis (CVT) accounts for 0.5-1 % of all strokes. Although dural puncture is proposed as one of the rare risk factors, this association has only been mentioned in anecdotal reports.

The prevalence and extent of coronary atherosclerosis among patients with a zero calcium score and the influence of patient characteristics.

Purpose: Coronary artery calcium (CAC) is a specific indicator of and an independent risk factor for atherosclerosis; however, calcium scoring may miss noncalcified plaques, which may have clinical importance. The aim of this study was both to identify the presence and extent of coronary plaques during computed tomography coronary angiography (CTCA) in patients with a zero CAC score and to evaluate the effect of risk factors and symptom status on the presence of noncalcified plaques.

Materials And Methods: In this retrospective study, we analyzed the cases of 842 consecutive patients between October 2006 and November 2011.

Anomalous Origin of the Left Coronary Artery from the Pulmonary Artery: Diagnosis with CT Angiography.

Anomalous origin of the left coronary artery from the pulmonary artery (ALCAPA) is a rare congenital anomaly. It is associated with early infant mortality and sudden death in adults. Traditionally, ALCAPA has been diagnosed by angiography or autopsy; however, the development of cardiac computed tomography (CT) and magnetic resonance imaging (MRI) has allowed noninvasive evaluation of the coronary anatomy by direct visualization of the origin of the left coronary artery (LCA) from the pulmonary artery.

A rare coronary artery anomaly: double left anterior descending artery.

Double left anterior descending coronary artery arising from the left and right coronary arteries is one of the rarest of coronary anomalies. In this report, we present a case of double left anterior descending coronary artery with one originating from the left main stem and the second one originating from the same ostium with the right coronary artery, passing to the left side following an inter-arterial course between aorta and right ventricular outflow tract and spreading to the anterior wall of the left ventricle. The diagnosis was made with multislice computed tomography angiography.

Colloid cyst of the third ventricle associated with anterior cerebral artery trifurcation and agenesis of the corpus callosum: findings on MRI and CT angiography.

We report MRI with diffusion-weighted imaging, and multidetector CT angiography findings in a child with complete agenesis of the corpus callosum associated with a colloid cyst and trifurcation of the anterior cerebral artery. Although rare, a colloid cyst should be considered in the differential diagnosis of midline lesions in children with agenesis of the corpus callosum since it may require surgical intervention.

The contribution of MR coronary angiography to the diagnosis of a left anterior descending artery aneurysm in a patient with Kawasaki disease.

We present a 4-year-old boy with a diagnosis of Kawasaki disease of six-month history. At the time of diagnosis, no significant coronary artery aneurysm was detected by transthoracic echocardiography. On his routine follow-up echocardiography, dilatation of the left anterior descending (LAD) artery was suspected, but an exact diagnosis could not be made.

Accuracy of MR coronary angiography in the evaluation of coronary artery stenosis.

Purpose: To examine the accuracy of magnetic resonance (MR) coronary angiography for the evaluation of coronary artery stenoses, and to compare the results with conventional angiography as the reference standard.

Materials And Methods: Eighteen patients were examined. The pulse sequence was an ECG-triggered, T2-prepared, fat-suppressed 3D true fast imaging with steady state precession sequence with navigator respiratory gating.

Evaluation of coronary stent patency and in-stent restenosis with dual-source CT coronary angiography without heart rate control.

Objective: Dual-source CT has excellent temporal resolution and allows good visualization of coronary vessels without heart rate control. Our aim was to evaluate the diagnostic performance of dual-source CT in the evaluation of coronary stent patency to determine whether the good temporal resolution would improve visualization of stents.

Subjects And Methods: Thirty-five consecutively registered patients (10 women, 25 men; mean age, 65 years) with 48 stents were examined prospectively without heart rate controlling agents.

Effectiveness of dual-source CT coronary angiography for the evaluation of coronary artery disease in patients with atrial fibrillation: initial experience.

Purpose: To prospectively evaluate the sensitivity and specificity of dual-source CT for significant coronary stenosis (>50% narrowing) in patients with atrial fibrillation (AF), by using conventional coronary angiography as the reference standard.

Materials And Methods: Institutional Review Board approval and informed consent were obtained. Fifteen consecutive patients (nine men, six women; mean age, 58.

Contrast-enhanced 64-slice computed tomography in detection and evaluation of anomalous coronary arteries.

Anomalous coronary artery (ACA) has either an unusual origin or different anatomical course and is associated with sudden cardiac death. The absence or nonspecific symptoms of ACA make its diagnosis difficult. Mostly, ACA is diagnosed coincidentally during invasive coronary angiogram (ICA).

An aneurysmal left circumflex artery-to-right atrium fistula in a patient with ischemic symptoms: accurate diagnosis with dual-source CT angiography.

In this report, we present a 55-year-old female patient with a left circumflex artery-to-right atrial fistula associated with a huge saccular aneurysm. She had undergone conventional angiography due to ischemic symptoms. In conventional angiography, a very dilated and tortuous vessel originating from the circumflex artery and continuous with a huge saccular aneurysm was visualized but the drainage site could not be demonstrated.

Detection of significant coronary artery stenosis with 64-section MDCT angiography.

Purpose: To prospectively evaluate the diagnostic performance of 64-section multidetector computed tomography (MDCT) to detect significant coronary artery stenosis using conventional coronary angiography (CCA) as the reference standard.

Materials And Methods: Institutional Review Board approval and informed consent were obtained. In this prospective study, 80 patients (61 male, 19 female, mean age 56) were examined.

Coronary stent patency and in-stent restenosis: determination with 64-section multidetector CT coronary angiography--initial experience.

Purpose: To prospectively assess the diagnostic performance of 64-section multidetector computed tomography (CT) for the evaluation of coronary stent stenosis and occlusion by using conventional coronary angiography as the reference standard.

Materials And Methods: Institutional review board approval and informed consent were obtained. Thirty patients (27 men, three women; mean age, 58.

Right coronary artery to left ventricle fistula--effective diagnosis with 64-MDCT.

Coronary artery fistula is a rare congenital anomaly in which a communication is present between a cardiac chamber or another vascular structure. In this paper, we describe a 52-year-old asymptomatic male patient with a right coronary artery to left ventricle fistula. We demonstrate the effectiveness of 64-MDCT (Multi-detector row computed tomography) in demonstrating the precise anatomy of this fistula in which transthoracic echocardiography was inadequate for evaluation.