Quantitative analysis of pulmonary emphysema: three-dimensional fractal analysis of single-photon emission computed tomography images obtained with a carbon particle radioaerosol.

Abstract

OBJECTIVE. Thepurpose ofthisstudy wastoquantify theheterogeneous distribution of a carbon particle radioaerosol in the lungs of patients with pulmonary emphysema using sin gle-photon emission computed tomography (SPECT) and fractal analysis.

Quantification of the heterogeneity of cerebral blood flow in vascular dementia

“…As described previously [27,28], familiar matrices from classical geometry such as length, area, and volume depend on the scale at which we decide to examine an object. In fractal geometry, the relationship between a measure (M) and the scale (a) is expressed as…”

Interstitial Lung Disease Classification Using Feed Forward Neural Networks

“…Each patch has overlap with marked ROI. It can be understood from the work [4], [5], [11], [12] that GLCM, GLRLM and histogram of local binary patterns can give more discriminative information about ILD patterns. Fig.…”

“…[19] proposed texture classification, based on wavelet features. Also various study has been carried out on classification of ILD patterns using textural information [3]- [5][6], [7]. Information from HRCT scan can be used to accurately classify the ILD patterns.…”

“…Also, Michinobu Nagao et.al. [5] proposed Histogram features followed by bayes classifier for ground glass and micronodule detection. To get more and more accurate classification many researchers have used artificial neural networks (ANN).…”

Fractal Analysis of Nuclear Medicine Images for the Diagnosis of Pulmonary Emphysema

“…ttempts have been made to quantify the spatial distribution of radioaerosol in the lungs during ventilation nuclear medicine examinations for the diagnosis of pulmonary diseases such as emphysema [1][2][3]. In pulmonary emphysema with functional impairments of the alveoli, ventilation images indicate focal areas of decreasing pixel intensity [4].…”