Results 71 to 80 of about 95,958 (315)

Application of Monte Carlo algorithms to cardiac imaging reconstruction [PDF]

arXiv, 2021
Monte Carlo algorithms have a growing impact on nuclear medicine reconstruction processes. One of the main limitations of myocardial perfusion imaging (MPI) is the effective mitigation of the scattering component, which is particularly challenging in Single Photon Emission Computed Tomography (SPECT). In SPECT, no timing information can be retrieved to
arxiv  

A Bayesian Optimization Approach for Attenuation Correction in SPECT Brain Imaging [PDF]

arXiv, 2021
Photon attenuation and scatter are the two main physical factors affecting the diagnostic quality of SPECT in its applications in brain imaging. In this work, we present a novel Bayesian Optimization approach for Attenuation Correction (BOAC) in SPECT brain imaging.
arxiv  

Combination therapy with transcranial magnetic stimulation and ketamine for treatment-resistant depression: A long-term retrospective review of clinical use

Heliyon, 2019
Background: Both transcranial magnetic stimulation (TMS) and infused ketamine are recognized treatments for patients suffering from major depressive disorder (MDD). A novel therapy named combination TMS with ketamine (CTK) is introduced.
Steven R.D. Best, Dan G. Pavel, Natalie Haustrup   +2 more
doaj  

Stepwise Improvement of Cerebral Hemodynamics in Staged Angioplasty for Carotid Artery Stenosis

Neurologia Medico-Chirurgica
Staged angioplasty (SAP) is used as an alternative to preventing cerebral hyperperfusion syndrome (CHS) after carotid artery stenting (CAS), particularly among patients with compromised cerebral haemodynamics.
Fumiaki OKA, Takayuki OKU, Akiko KAWANO, Koki OKAZAKI, Takuma NISHIMOTO, Mototsugu SHIMOKAWA, Hideyuki ISHIHARA   +6 more
doaj   +1 more source

Comparison of Fractional Flow Reserve and Myocardial Perfusion Imaging in Saphenous Vein Grafts

Catheterization and Cardiovascular Interventions, EarlyView.
ABSTRACT Background Revascularization decision‐making for saphenous vein grafts (SVGs) relies on angiographic lesion severity estimation, as studies on fractional flow reserve (FFR) for detecting ischemia in SVGs are scarce. Aims To compare FFR and quantitative coronary angiography (QCA) of SVGs against myocardial perfusion imaging (MPI) and to ...
Roel Hoek, Ruben W. de Winter, Rens T. Peters, Yvemarie B. O. Somsen, Pepijn A. van Diemen, Ruurt A. Jukema, Jos W. Twisk, Niels J. Verouden, Alexander W. den Hartog, Pieter G. Raijmakers, Alexander Nap, Ibrahim Danad, Paul Knaapen   +12 more
wiley   +1 more source

A projection-domain low-count quantitative SPECT method for alpha-particle emitting radiopharmaceutical therapy [PDF]

arXiv, 2021
Single-photon emission computed tomography (SPECT) provides a mechanism to estimate regional isotope uptake in lesions and at-risk organs after administration of {\alpha}-particle-emitting radiopharmaceutical therapies ({\alpha}-RPTs). However, this estimation task is challenging due to the complex emission spectra, the very low number of detected ...
arxiv  

SPECT imaging in dementia

The British Journal of Radiology, 2007
Single photon emission computed tomography (SPECT) is a non-invasive functional neuroimaging technique that can be used in the diagnosis of dementia. This review describes some of the SPECT radiotracers available for imaging dementia patients and discusses recommendations for the clinical use of this imaging technique.
Pimlott, S, Ebmeier, K
openaire   +3 more sources

SPECT/CT in hyperparathyroidism [PDF]

Clinical and Translational Imaging, 2014
Hybrid SPECT/CT imaging is playing an increasingly important role in nuclear medicine in several oncological and non-oncological fields. This review presents a literature survey on the use of SPECT/CT as an adjunct to parathyroid scintigraphy in patients with hyperparathyroidism (HPT), highlighting the certainties and the controversies that have so far
Spanu, Angela, Schillaci, Orazio, Piras, Bastiana, Madeddu, Giuseppe   +3 more
openaire   +4 more sources

Role of Ion‐Pair and H‐Bonding in Colorimetric Detection of Insulin Fibrils with Picomolar Sensitivity

ChemPhotoChem, EarlyView.
Ultrasensitive detection (LOD=2 pM) of insulin amyloid fibril is achieved using a hemicyanine dye. A unique feature of amyloid induced dissociation of ion‐pair and solute‐solvent hydrogen bonding has been established to play a pivotal role for dual mode detection of amyloid fibrils.
Ayentika Sen, Aruna K. Mora, Soumitra Kundu, Sukhendu Nath   +3 more
wiley   +1 more source

The right ventricle under pressure: Anatomy and imaging in sickness and health

Journal of Anatomy, Volume 242, Issue 1, Page 17-28, January 2023., 2023
The RV is essential to the homeostasis of normal physiology and disturbances in RV structure and function has a substantial effect on patient outcomes. This review sets out to describe the developmental and anatomical complexities of the right ventricle while exploring the modern techniques employed to image and understand its function from a clinical ...
Harrison Stubbs, Alexander MacLellan, Stephanie Lua, Helen Dormand, Colin Church   +4 more
wiley   +1 more source