Studies on the mechanism of cell death. IV. Alterations in phosphorylative capacity during cell death.
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Adenosine Triphosphatases↗
Biomedical subjects
P Batra
Publications and source records attributed to P Batra.
Diagnosis of peripheral pulmonary emboli by MR imaging: an experimental study in dogs.
The peripheral pulmonary arteries of 5 dogs were embolized with boiled autologous clots via the external right jugular vein. Angiography determined the location and approximate size of the emboli in the peripheral pulmonary arteries. With spin echo techniques, transverse axial magnetic resonance (MR) images (0.3 T, 12.77 MHz) were obtained in each animal from apex to thorax base, on a permanent magnet scanner. The sensitivity of MR imaging was assessed to detect these clots and to determine their size and location. In 2 dogs, scans were also obtained before embolization in order to exclude possible artifactual areas of increased signal. Fourteen out of 19 emboli were identified on the MR scans as areas of increased signal. Their diameter measured a minimum of 2.7 mm matching the filling defects seen on the angiograms. There were three false positive emboli on MR probably related to slow blood flow in the inferior vena cava. There were 9 false negative emboli on MR. The increased MR signal seen in dogs with pulmonary emboli results from the embolus itself and from slow blood flow distal to the obstructive embolus.
Animals↗
MR imaging of aneurysm of an aberrant right subclavian artery.
Magnetic resonance (MR) imaging was performed for evaluation of a right paramediastinal mass in an asymptomatic 84-year-old woman. An aneurysm of an aberrant right subclavian artery was diagnosed. This rare complication of a common congenital anomaly and the use of MR in evaluation is discussed.
Aged↗
MR imaging of the thorax: a comparison of axial, coronal, and sagittal imaging planes.
We performed direct multisection coronal and sagittal magnetic resonance (MR) images in addition to axial images to determine the value and limitations of coronal and sagittal planes compared with axial planes. Ninety-four MR examinations of the thorax were performed with a 0.3 T permanent magnet system (Fonar) by spin echo technique. The MR axial images were found superior to coronal in demonstrating prevascular adenopathy (one case), pretracheal nodes (nine cases), left paraaortic nodes (three cases), subcarinal nodes (three cases), and small pleural effusions (three cases). The coronal or sagittal planes were better to determine relationship of a mass at the lung apex (five cases) or an abnormality at the lung base (five cases). The anteroposterior displacement or compromise of great vessels and bronchi was best displayed on the axial plane whereas craniocaudal displacement of above structures was best seen on the coronal plane. The axial images were found most informative and we suggest that they be performed routinely. Coronal or sagittal planes may be added in selected cases.
Carcinoma, Bronchogenic↗
Pitfalls in the diagnosis of thoracic aortic dissection at CT angiography.
Two hundred seventy-five computed tomographic (CT) angiograms of the thoracic aorta were obtained over a period of approximately 4 years in patients with suspected or known aortic dissection. In all cases, unenhanced images were initially obtained, followed by contrast material-enhanced images. A variety of pitfalls were encountered that mimicked aortic dissection. These pitfalls were attributable to technical factors (eg, improper timing of contrast material administration relative to image acquisition); streak artifacts generated by high-attenuation material, high-contrast interfaces, or cardiac motion; periaortic structures (eg, aortic arch branches, mediastinal veins, pericardial recess, thymus, atelectasis, pleural thickening or effusion adjacent to the aorta); aortic wall motion and normal aortic sinuses; aortic variations such as congenital ductus diverticulum and acquired aortic aneurysm with thrombus; and penetrating atherosclerotic ulcer. Although several of these pitfalls are easy to recognize and therefore unlikely to present a diagnostic problem, others are potentially confusing. Familiarity with these common pitfalls, coupled with a knowledge of normal intrathoracic anatomy, will facilitate recognition of true aortic dissection and help avoid misdiagnosis at thoracic aortic CT angiography.
Aortic Dissection↗
Midline lethal granuloma--a clinical enigma.
Midline Lethal granuloma is characterized by progressive destruction of nose, paranasal sinuses and palate. Till date, the diagnosis of this mutilating process remains as enigma due to the non specific histological and systemic findings. However, over the years the clinicians have been able to divide the "Lethal midline granuoloma syndrome" into clinical entities: Idiopathic midline destructive disease, Wegener's granulomatosis, polymorphic retiaculosis and Non-Hodgkins lymphoma. This article attempts to distinguish between these disease entities in the light of 2 case reports of Idiopathic midline destructive disease.
Adult↗
Langerhans' cell histiocytosis - A Case Report.
Langerhan's histiocytosis was formerly known as histiocytosis X and refers to a group of conditions characterized by the uncontrolled stimulation and proliferation of a normal antigen-processing cell, the Langerhan's cell. Mandibular involvement associated with LCH is uncommon in a young child. Most reports describing bone involvements in LCH have mainly referred to male subjects over 20 years of age. The purpose of this report is to describe a case of multifocal bony LCH with mandibular involvement in a 8 year old girl and to discuss the appropriate management of such a case.
Journal Article↗
Radiology in prevention and surveillance of occupational lung disease.
This article reviews the role of radiology in the prevention and surveillance of occupational lung disease. The technical aspects of imaging and the International Labor Organization classification are described. Radiographic findings are discussed in the setting of (1) inhalation of mineral dust such as silica, coal, and asbestos; (2) inhalation of organic agents; and (3) exposure to chemicals considered carcinogenic to the lung.
Humans↗