Kidney computed tomography perfusion in patients with ureteral obstruction.

Introduction: Kidney perfusion on CT is an encouraging surrogate for renal scintigraphy in assessing renal function. However, data on dynamic volumetric CT in patients with kidney obstruction is lacking. Thus, the aim of this study is to determine the feasibility of CT-based renal perfusion using a dynamic volume to assess renal hemodynamics at different degrees and durations of obstruction.

Effect of 24-hour blood pressure and heart rate on the prognosis of patients with reduced and midrange LVEF.

Aim    Optimal combination therapy for chronic heart failure (CHF) currently implies the mandatory use of at least four classes of drugs: renin-angiotensin-aldosterone (RAAS) system inhibitors or angiotensin receptor blocker neprilysin inhibitors (ARNI); beta-adrenoblockers (BAB); mineralocorticoid receptor antagonists; and sodium-glucose cotransporter 2 inhibitors. Furthermore, many of these drugs are able to decrease blood pressure even to hypotension and alleviate tachycardia. This study focused on the relationship of 24-h blood pressure (BP) and heart rate (HR) with the prognosis for CHF patients with sinus rhythm and left ventricular ejection fraction (LV EF) <50 % as well as on suggesting possible variants of safe therapy for CHF depending on the combination of studied factors.

Dual-Energy Computed Tomography for Stone Type Assessment: A Pilot Study of Dual-Energy Computed Tomography with Five Indices.

To assess the efficacy of dual-energy CT (DECT) in predicting the composition of urinary stones with a single index (dual energy ratio [DER]) and five indices. Patients undergoing DECT before active urolithiasis treatment were prospectively enrolled in the study. Predictions of stone composition were made based on discriminant analysis with a single index (DER) and five indices (stone density at 80 and 135 kV, Zeff [the effective atomic number of the absorbent material] of the stone, DER, dual-energy index [DEI] and dual-energy difference [DED]).

[Clinical value of CT-perfusion in patients with ureteric stones].

Introduction: Urinary stone disease is one of the most significant urologic diseases, since its prevalence increases annually, which makes it necessary to study and improve effective preventive measures, diagnostic methods and to implement new treatment interventions.

Aim: to study changes in blood flow in the renal cortex and medulla in patients with ureteral stones using CT perfusion.

Materials And Methods: From 2017 to 2019, a total of 53 patients with upper ureteric stones were evaluated at the Russian-Japanese Center for Imaging and the Institute of Urology and Reproductive Health of the FGAOU VO I.

[Dual-energy computed tomography in the diagnostics of urolithiasis].

The Aim: To assess the diagnostic performance of dual-energy computed tomography (DECT) in the evaluation of the composition of urinary stones "in vivo".

Materials And Methods: A total of 91 patients aged from 20 to 70 years old (mean 42.7) with urinary stone disease were examined at Sechenov University, including 68 men (75%) and 23 women (25%).