This paper studies the triangle similarity classes obtained by iterative application of longest-edge trisection triangles. The (3T-LE) a is joining two points which divide longest edge in three equal parts with opposite vertex. partition, as well bisection (2T-LE), does not degenerate, means that there positive lower bound to minimum angle generated. However, unlike what happens 2T-LE, number a...

The challenges for cardiac MR imaging range in a magic triangle of spatial and temporal resolution, signal-to-noise ratio and the limitations induced by the need for breath-hold imaging. With the advent of multi-channel whole-body MRI systems at 3Tesla, these limitations can now be overcome. Parallel acquisition techniques (PAT) allow increasing temporal or spatial resolution at virtually no co...

Magnetic resonance (MR) images from low-field scanners present poorer signal-to-noise ratios (SNRs) than those high-field at the same spatial resolution. To obtain a clinically acceptable SNR, radiologists operating use much smaller acquisition matrix scanners. Thus, current state of image quality indicates need for further research to improve systems. Strategies based on super-resolution (SR) ...

INTRODUCTION Creating contrast between normal anatomy and pathology is the main goal of imaging. Here we compare contrast ratios of enhancing brain lesions at 1.5T between T1 TSE, magnetization prepared rapid gradient echo (MPRAGE) and subtraction and at 3T between T1 FLAIR, MPRAGE and subtraction. METHODS Contrast ratio between enhancing lesions and normal contralateral brain was measured fo...

PURPOSE To investigate the feasibility of measuring myocardial T2 at 3 Tesla for assessment of tissue iron in thalassemia major and other iron overloaded patients. MATERIALS AND METHODS A single-breathhold electrocardiogram-triggered black-blood multi-echo spin-echo (MESE) sequence with a turbo factor of 2 was implemented at 3 Tesla (T). Myocardial and liver T2 values were measured with three...

The relevance of cortical grey matter pathology in multiple sclerosis has become increasingly recognised over the past decade. Unfortunately, a large part of cortical lesions remain undetected on MRI using standard field strength. In vivo studies have shown improved detection by using higher magnetic field strengths up to 7 T. So far, a systematic histopathological verification of ultrahigh-fie...

BACKGROUND AND PURPOSE The spatial resolution of 3D time-of-flight MR angiography (TOF-MRA) can be improved within a reasonable examination time by combining 3T and sensitivity encoding technique. We evaluated the diagnostic performance of high-resolution 3D TOF-MRA at 3T in patients with suspected atherosclerotic steno-occlusive disease of the intracranial arteries. MATERIALS AND METHODS We ...

BACKGROUND Cardiovascular magnetic resonance (CMR) T1 mapping indices, such as T1 time and partition coefficient (λ), have shown potential to assess diffuse myocardial fibrosis. The purpose of this study was to investigate how scanner and field strength variation affect the accuracy and precision/reproducibility of T1 mapping indices. METHODS CMR studies were performed on two 1.5T and three 3...

A three-bladed, dual-axis teetering hub (3T) has been developed and compared to a three-bladed rigid (3R) using computer modeling. Both hubs were fitted hypothetical 5-MW offshore wind turbine mounted on an floating platform. Cyclic analysis showed the 3T significantly reduced impact of shear blades virtually eliminated both turbulence main shaft bearing yaw bearing. Lifetime fatigue studies fo...