Study of Hematological Parameters and Morphometric Indices of Erythrocytes in Rats Exposed to Calcium Oxide Nanoparticles

Bulletin of Experimental Biology and Medicine - In female Wistar rats, we studied the effects of daily 20-day administration of intragastric suspension of nanosized calcium oxide on hematological...     

Time-resolved contrast-enhanced imaging with isotropic resolution and broad coverage using an undersampled 3D projection trajectory.

Time-resolved contrast-enhanced 3D MR angiography (MRA) methods have gained in popularity but are still limited by the tradeoff between spatial and temporal resolution. A method is presented that greatly reduces this tradeoff by employing undersampled 3D projection reconstruction trajectories. The variable density k-space sampling intrinsic to this sequence is combined with temporal k-space interpolation to provide time frames as short as 4 s. This time resolution reduces the need for exact contrast timing while also providing dynamic information. Spatial resolution is determined primarily by the projection readout resolution and is thus isotropic across the FOV, which is also isotropic. Although undersampling the outer regions of k-space introduces aliased energy into the image, which may compromise resolution, this is not a limiting factor in high-contrast applications such as MRA. Results from phantom and volunteer studies are presented demonstrating isotropic resolution, broad coverage with an isotropic field of view (FOV), minimal projection reconstruction artifacts, and temporal information. In one application, a single breath-hold exam covering the entire pulmonary vasculature generates high-resolution, isotropic imaging volumes depicting the bolus passage.     

Surgical treatment of Meckel's diverticulum

The author analysed the results of operations on 19 patients with emergency diseases of the abdominal organs caused by pathological processes in Meckel's diverticulum. The inflammatory process in the diverticulum led to acute obstruction of the small intestine in 12, acute diverticulitis in 5, and peptic ulcer complicated by perforation of the intestinal wall in 2 patients. Two patients died in the postoperative period from progressing peritonitis. It was established that Meckel's diverticulum may occur in any area of the small intestine. Meckel's diverticulum detected during planned laparotomy must be resected.     

Transcranial electrostimulation augments physical working capacity

Transcranial stimulation using weak electric current with rigidly fixed parameters is shown to prolong the time during which BALB/c and CBA/Lac mice are capable of swimming with a weight attached to their body and to accelerate their recovery after submaximal exercise. The increase in working capacity is blocked by the opioid receptor antagonist naloxone. The use of transcranial electrostimulation to augment adaptive capabilities of the body is discussed. Translated fromByulleten' Eksperimental'noi Biologii i Meditsiny, Vol. 122, No. 8, pp. 128–130, August, 1996