Pleural effusion is an uncommon lung disease characterized by a build-up of fluid between the two layers of the pleura that causes specific symptoms, such as chest pain and shortness of breath. Machine learning techniques have been widely used for abnormality detection in medical images. Chest X-ray images (CXR) are among the non-invasive diagnostic tools used to detect various disease. In the proposed work, two different feature extractions namely Scale Invariant Feature Transform and Zernike features are extracted. The extracted features are fed into the classifier namely Random Forest and K-nearest Neighbor which classifies into effusion, emphysema, infiltration, no-findings and pleural thickening. The results are compared were ZERNIKE with Random Forest grants the satisfactory results of 94.30 %.

Scale-invariant feature transform

Abnormality

Feature (linguistics)

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The Relationship between Prolapsing Mitral Leaflet Syndrome and Angina and Normal Coronary Arteriograms

CHEST Journal (1976)

Fred K. Nakhjavan Gangaiah Natarajan Paravasthu Seshachary Harry Goldberg

10.1378/chest.70.6.706

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Citations (11)

Myocardial lactate metabolism during isometric hand grip test: Comparison with pacing tachycardia

Heart (1975)

Fred K. Nakhjavan Gangaiah Natarajan Andrew Smith Michael B. Dratch Harvey L. Goldberg

Twenty-five patients with chest pain were studied by left ventriculography and coronary arteriography. Myocardial metabolic studies were done during control state, pacing tachycardia, isometric hand grip at 30 per cent of maximum force, and combined hand grip plus pacing tachycardia. Nine patients had myocardial lactate abnormality (group I) as evidenced by myocardial lactate production or decreased extraction (less than 10%). Though tension time index and triple product (left ventricular ejection time × HR × systolic pressure) as determinants of myocardial oxygen consumption were highest during combined hand grip plus pacing tachycardia, myocardial lactate abnormalities were most frequent during pacing tachycardia. The present study indicates that isometric hand grip even if performed during pacing tachycardia is not a sensitive test for detection of myocardial lactate abnormalities. The rising level of arterial lactate during isometric hand grip is the most likely mechanism of positive myocardial arteriovenous lactate difference.

Hand strength

10.1136/hrt.37.1.79

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Citations (12)

International Journal of Pharmaceutical Sciences and Research (2011)

P Palanisamy G Sasikala D Mallikaraj Gangaiah Natarajan

In the present experiment effect of electroplating industrial effluent chromium on the behavioral responses of freshwater air-breathing cat fish Mystus cavasius was studied.The toxicity of chromium to aquatic life is strongly influenced by the form of chromium and quality of water.The two most prevalent chromium forms found in plating industry waste water are hexavalent chromium (Cr +6 ) and trivalent chromium (Cr +3 ).The fishes exhibited various behavioral responses -locomotory, physiological, neurological and morbidity responses under influence of chromium industrial effluent.One of the major advantages of using data on behavioral effects is that they are more sensitive indicators of potential for impacts on survival in the filed than are measures of lethality.Study noted the possible utility of the behavior responses as rapid biomonitory assessment technique for qualitative evaluation of various industrial pollutants.

10.13040/ijpsr.0975-8232.2(7).1790-92

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Effect of sublethal concentration of metasystox on selected oxidative enzymes, tissue respiration, and hematology of the freshwater air-breathing fish, Channa striatus (Bleeker)

Pesticide Biochemistry and Physiology (1984)

Gangaiah Natarajan

Succinic dehydrogenase

Lactic dehydrogenase

Hematology

Oxidative enzyme

10.1016/0048-3575(84)90054-3

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Citations (23)

Myocardial metabolic studies in prolapsing mitral leaflet syndrome.

Circulation (1975)

Gangaiah Natarajan Fred K. Nakhjavan D. Kahn S. Yazdanfar Waheed A. Sahibzada

Patients with prolapsing mitral leaflet syndrome (PML) frequently have chest pain of undetermined etiology. Twenty-three patients with PML underwent cardiac hemodynamic, angiographic, and metabolic studies. The latter were performed during control spontaneous heart rate and tachycardia by right atrial pacing. Myocardial supply-demand ratio (DPTI:SPTI) was estimated from the planimetric integration of the diastolic area (diastolic pressure time index = DPTI) and systolic area (systolic pressure time index = SPTI) of the central aortic pressure. Chest pain during pacing occurred in five patients. In two patients, it was associated with ST depression typical of ischemia on the electrocardiogram. Myocardial lactate abnormalities (lactate production or less than 10% extraction) occurred in seven patients during pacing tachycardia and was present in two patients during control state. DPTI:SPTI ratio during control state was 1.22 (+/- 0.07 SE) and decreased to 0.85 (+/- 0.05 SE) during pacing tachycardia. It is concluded that the myocardial lactate abnormalities in PML, which were present in approximately 30% of the patients in the present series, are most likely due to myocardial hypoxia. Whether or not the hypoxia is secondary to "small vessel disease" is not elucidated by this study.

Cardiac index

10.1161/01.cir.52.6.1105

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Citations (37)

Disruption of circadian rhythm of tissue respiration inChanna striatus by Metasystox®

Experientia (1985)

Gangaiah Natarajan

10.1007/bf02007683

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Citations (4)

Pulmonary function studies in elderly males.

PubMed (1966)

Gangaiah Natarajan R Viswanathan

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