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pneumothorax size quantification

Angelo M Taveira-DaSilva, Joel Moss
Lymphangioleiomyomatosis (LAM) is a multisystem disease of women, characterized by proliferation of abnormal smooth muscle-like LAM cells, leading to the formation of lung cysts, fluid-filled cystic structures in the axial lymphatics (eg, lymphangioleiomyomas), and renal angiomyolipomas. LAM is caused by mutations of the TSC1 or TSC2 genes, which encode, respectively, hamartin and tuberin, two proteins with a major role in control of the mammalian target of rapamycin (mTOR) signaling pathway. LAM occurs sporadically or in association with tuberous sclerosis complex, an autosomal-dominant syndrome characterized by widespread hamartomatous lesions...
2015: Clinical Epidemiology
Giovanni Volpicelli, Enrico Boero, Nicola Sverzellati, Luciano Cardinale, Marco Busso, Francesco Boccuzzi, Mattia Tullio, Alessandro Lamorte, Valerio Stefanone, Giovanni Ferrari, Andrea Veltri, Mauro F Frascisco
BACKGROUND: Lung ultrasound (LUS) may accurately diagnose pneumothorax. However, there is uncertainty about its usefulness in the quantification of pneumothorax size. To determine the ability of LUS in the semi-quantification of pneumothorax volume, we compared the projection of the lung point (LP) with the pneumothorax volume measured by computerized tomography (CT) and the interpleural distance on chest radiography (CXR). METHODS: We performed LUS in patients with pneumothorax and all the LP located on the chest wall were compared to CXR and CT studies...
October 2014: Intensive Care Medicine
Michael S Kristensen, Wendy H Teoh, Ole Graumann, Christian B Laursen
OBJECTIVES: To create a state-of-the-art overview of the new and expanding role of ultrasonography in clinical decision-making, intervention and management of the upper and lower airways, that is clinically relevant, up-to-date and practically useful for clinicians. METHODS: This is a narrative review combined with a structured Medline literature search. RESULTS: Ultrasonography can be utilised to predict airway difficulty during induction of anaesthesia, evaluate if the stomach is empty or possesses gastric content that poses an aspiration risk, localise the essential cricothyroid membrane prior to difficult airway management, perform nerve blocks for awake intubation, confirm tracheal or oesophageal intubation and facilitate localisation of tracheal rings for tracheostomy...
April 2014: Insights Into Imaging
Antonio J Salazar, Diego A Aguirre, Juliana Ocampo, Juan C Camacho, Xavier A Díaz
This study focused on the effects of pneumothorax size quantification in digital radiology environments when a quantification method is selected according to the radiologist's criteria. The objective of this study was to assess the effects of factors, including the radiologist (with different experience), displays (medical-grade and consumer-grade displays), or display calibration, on the Rhea, Collins, and Light quantification methods. This study used a factorial design with 76 cases, including 16 pneumothorax cases observed by six radiologists on three displays with and without the DICOM standard calibration...
April 2014: Journal of Digital Imaging: the Official Journal of the Society for Computer Applications in Radiology
Wenli Cai, Marc de Moya
PURPOSE OF REVIEW: Pneumothorax, a potentially life-threatening condition, is present in about one-third of chest trauma patients. Traditionally, pneumothorax has been diagnosed and managed by use of chest radiography, which has been found inaccurate and inconsistent. With the ubiquitous application of multidetector computed tomography (MDCT) in emergency care, MDCT quantification of pneumothoraces becomes an emerging technique for accurate determination of the size of pneumothoraces...
July 2013: Current Opinion in Pulmonary Medicine
Synho Do, Kristen Salvaggio, Supriya Gupta, Mannudeep Kalra, Nabeel U Ali, Homer Pien
An automated, computer-aided diagnosis (CAD) algorithm for the quantification of pneumothoraces from Multidetector Computed Tomography (MDCT) images has been developed. Algorithm performance was evaluated through comparison to manual segmentation by expert radiologists. A combination of two-dimensional and three-dimensional processing techniques was incorporated to reduce required processing time by two-thirds (as compared to similar techniques). Volumetric measurements on relative pneumothorax size were obtained and the overall performance of the automated method shows an average error of just below 1%...
2012: Computational and Mathematical Methods in Medicine
Wenli Cai, June-Goo Lee, Karim Fikry, Hiroyuki Yoshida, Robert Novelline, Marc de Moya
It is commonly believed that the size of a pneumothorax is an important determinant of treatment decision, in particular regarding whether chest tube drainage (CTD) is required. However, the volumetric quantification of pneumothoraces has not routinely been performed in clinics. In this paper, we introduced an automated computer-aided volumetry (CAV) scheme for quantification of volume of pneumothoraces in chest multi-detect CT (MDCT) images. Moreover, we investigated the impact of accurate volume of pneumothoraces in the improvement of the performance in decision-making regarding CTD in the management of traumatic pneumothoraces...
July 2012: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
Bram van Ginneken, Laurens Hogeweg, Mathias Prokop
Chest radiographs are the most common exam in radiology. They are essential for the management of various diseases associated with high mortality and morbidity and display a wide range of findings, many of them subtle. In this survey we identify a number of areas beyond pulmonary nodules that could benefit from computer-aided detection and diagnosis (CAD) in chest radiography. These include interstitial infiltrates, catheter tip detection, size measurements, detection of pneumothorax and detection and quantification of emphysema...
November 2009: European Journal of Radiology
K Hoi, B Turchin, A-M Kelly
In Europe, the Light index is used for estimating the size of pneumothorax. It is based on the proportional relationship between the collapsed lung and the hemithorax. Other methods rely on absolute measurements on radiographs. The aim of this study was to compare the estimated size of pneumothoraces using Light index with that estimated using the CT volumetrics-derived Collins method. This was a secondary analysis of radiographs from a database of pneumothoraces treated conservatively. Radiographs were measured independently by two researchers according to the methods described by Light and Collins...
April 2007: Australasian Radiology
M Noppen, P Alexander, P Driesen, H Slabbynck, A Verstraete
BACKGROUND: The size of a pneumothorax (PTX) is usually estimated by the Light index. Treatment strategies of (primary, spontaneous) PTX partially depend upon the size of the PTX. To our knowledge, the Light index has not yet been correlated with the actual volume of the PTX. OBJECTIVES: To correlate the estimated size of a primary spontaneous PTX by means of the Light index, with the actual amount of air present in the pleural space. METHODS: Actual PTX volumes were measured by means of manual aspiration of air present in the pleural space in 18 patients with primary spontaneous PTX and correlated with the size estimation obtained by the Light index...
2001: Respiration; International Review of Thoracic Diseases
C D Collins, A Lopez, A Mathie, V Wood, J E Jackson, M E Roddie
OBJECTIVE: The aim of this study was to define the relationship between interpleural distance measurements on an erect posteroanterior chest radiograph and pneumothorax size as measured by helical CT in a series of patients. SUBJECTS AND METHODS: Twenty pneumothoraces from 19 patients (10 males, nine females) were analyzed. Most pneumothoraces were on the right side (n = 16). The etiology was spontaneous in seven patients and iatrogenic in thirteen. All patients underwent an erect inspiratory posteroanterior radiograph and a helical CT scan of the thorax on the same visit to the radiology department...
November 1995: AJR. American Journal of Roentgenology
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