• Title, Summary, Keyword: chest PA

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Rate of Transformation and Normal Range about Cardiac Size and Cardiothoracic Ratio According to Patient Position and Age at Chest Radiography of Korean Adult Man (한국인 성인 남성의 흉부 방사선영상에서 자세와 연령에 따른 심장 크기 및 심흉비의 정상 범위와 변환율)

  • Joo, Young-Cheol;Lim, Cheong-Hwan;Kim, Yun-Min;Jung, Hong-Ryang;Hong, Dong-Hee
    • Journal of radiological science and technology
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    • v.40 no.2
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    • pp.179-186
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    • 2017
  • Purpose of this study is present the normal range of cardiac size and cardiothoracic ratio according to patient position(chest PA and AP) and age of Korean adult male on digital chest X - ray, And to propose a mutually compatible conversion rate. 1,024 males were eligible for this study, among 1,300 normal chest patients who underwent chest PA and low-dose CT examinations on the same day at the 'S' Hospital Health Examination Center in Seoul From January to December 2014. CS and CTR were measured by Danzer (1919). The mean difference between CS and CTR was statistically significant (p<0.01) in Chest PA (CS 135.48 mm, CTR 43.99%) and Chest AP image (CS 155.96 mm, CTR 51.75%). There was no statistically significant difference between left and right heart in chest PA and AP images (p>0.05). CS showed statistically significant difference between Chest PA (p>0. 05) and Chest AP (p<0.05). The thorax size and CTR were statistically significant (p<0.01) in both age and chest PA and AP. Result of this study, On Chest AP image CS was magnified 15%, CTR was magnified 17% compare with Chest PA image. CS and CTR were about 10% difference by changing posture at all ages.

The Effect of Chest Physiotherapy on the Amount of Tracheal Secretion and $PaO_2$ (흉부물리요법이 기관 분비물량과 동맥혈 산소분압에 미치는 영향)

  • Jun Seong-Sook;Moon Mi-Jin
    • Journal of Korean Academy of Fundamentals of Nursing
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    • v.7 no.3
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    • pp.355-365
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    • 2000
  • The purpose of this research was to find out the effect of chest physiotherapy on the amount of tracheal secretion and $PaO_2$. After changing position of the neurosurgical patients who had tracheostomy cannula, experimental treatments were applied as bellows, manual chest percussion on groupI, chest percussion and manual chest vibration on groupII, chest percussion and mechanical chest vibration on groupIII were done. After these trials, we have analyzed the efficacy of each procedures comparing the group differences in the quantity of tracheal secretion and $PaO_2$. Target samples were sixty patients aged between 20 to 60 who have tracheostomy state and decreased consciousness status that were admitted in NICU of a university hospital from June 1 to August 31, 1999. They assigned randomly into three experimental groups. To compare the effect of each interventions, tracheal secretion quantify was measured and $PaO_2$ was analyzed via arterial blood gas analyzer. The data were analyzed by ANCOVA of 5% significance level using SPSS P/C program. The results were as bellows. 1) The first hypothesis 'There is a difference In the quantify of the secretion among GroupI, GroupII and GroupIII' was accepted.(F=29.27, p=0.00) 2) The second hypothesis 'There is a difference in $PaO_2$ among GroupI, GroupII and GroupIII' was rejected.(F=1.71, p=0.19) From this study results, positional change and manual chest vibration including chest percussion were the most effective treatment to get maximum amount of tracheal secretion and it was confirmed that mechanical chest vibration also made much better effect than sole chest percussion method. Therefore, we concluded that the mechanical or manual chest vibration with chest percussion is more effective respiratory care method than the sole chest percussion.

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Evaluation of Unexposed Images after Erasure of Image Plate from CR System (CR 시스템에서 IP 잠상의 소거 후 Unexposed Image의 평가)

  • Lim, Bo-Yeon;Park, Hye-Suk;Kim, Ju-Hye;Park, Kwang-Hyun;Kim, Hee-Joung
    • Progress in Medical Physics
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    • v.20 no.4
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    • pp.199-207
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    • 2009
  • It is important to initialize Image Plate (IP) completely for removing residual latent image by sodium lamp for reliability and repeatability of computed radiography (CR) system. The purpose of this study was to evaluate latent images of computed radiography (CR) images respect to delay time after erasure of foregone latent image and its effect, and erasure level. Erasure thoroughness for CR acceptance test from American Association of Physicist in Medicine (AAPM) Report 93 (2006) was also evaluated. Measurements were made on a CR (Agfa CR 25; Agfa, BELGIUM) system. Chest postero-anterior (PA), Hand PA, L-spine lateral radiographs were chosen for evaluation. Chest phantom (3D-torso; CIRS, USA) was used for Chest PA and L-spine lateral radiography. For Hand PA radiography, projections was done without phantom. Except Hand PA radiographs, noise was increased with delay time, and ghost image was appeared on overexposed area. Effect of delay after erasure on latent image was not seen on naked eye, but standard deviation (SD) of pixel value on overexposed area was relatively higher than that of other areas. On Hand PA and Chest PA radiographs, noise were not occurred by adjustment of erasure level. On L-spine lateral images at lower erasure level than standard level, noise including ghost image were occurred because of high tube current. Erasure thoroughness of CR system in our department was to be proved by these evaluation. The results of this study could be used as a baseline for IP initialization and reliability of CR images.

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Utility Comparison of Chest Lateral Decubitus Projection with AP and PA Position (흉부 측와위 촬영 시 전후방향과 후전방향 검사의 유용성 비교)

  • Choi, Guirack
    • Journal of the Korean Society of Radiology
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    • v.7 no.3
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    • pp.233-238
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    • 2013
  • Chest lateral decubitus radiation exposure PA be carried out in general, but emergency patient or the patient's discomfort in the body examination had a lot of inconvenience. In this study, we compared AP and PA image quality, patient safety, and analysis of the examination effectiveness between the two tests was to evaluate the usefulness. Pleurisy or pneumothorax in patients with suspected or diagnosed chest lateral decubitus radiation exposure 30 consecutive patients (male 20 patients, 10 females) were included in the study. Image quality evaluation method microstructure of lung, wide areas of diagnosis, a clear air-fluid interface, the patient rotate, cardiac shadow and sharp diaphragmatic was based on Department of Radiology specialist, division of pulmonology resident blind test was evaluated by four people. Chest decubitus by radiation exposure the AP and PA position examination the usefulness of comparative analysis Image quality in the AP and PA, whereas there was no significant difference in attitude, Stability of the patient and Radiation's examination efficiency AP position compared to the position of PA scores were higher. PA position does not require a examination may be of AP position in a position to suggest that.

The Relationship of Radiation Dose and Image Quality According to the Condition of Chest PA

  • Son, Jin-Hyun;Min, Jung-Whan;Kang, Byung-Sam;Dong, Kyung-Rae
    • Korean Journal of Digital Imaging in Medicine
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    • v.13 no.4
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    • pp.165-169
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    • 2011
  • The purpose of this study is to compare the measurement result of radiation dose by using standard thoracic phantom and ionization chamber to advice proposal in the shooting condition of chest PA projection at hospitals recently. And to understand the change between radiation dose and resolution in different conditions. The period this study was from August 2010 to September 2010 and the subjects of the study was 3 general hospitals, 4 personal hospitals and 1 laboratory at the college. Finally we study with 6 DR, 1 CR, and 4 F/S equipments. Most hospitals met advice proposal, but some of the hospitals exceed advice dose from the result of our study. We can lower radiation dose about 25% when kVp is lowered about 20% in DR equipment. And we can lower radiation dose about 50% when mAs is lowered about 35%. The image quality was similar to the original in the study. Most hospitals which exceed advice dose were personal hospitals. The reason why it happened is that radiation dose for chest PA projection at personal hospitals is higher than general hospitals and the personal hospitals' equipments are older than general hospitals' equipments. We guess that patients' radiation dose of chest PA projection can be lowered from the result.

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Distribution of the Scatter Ray on Chest X-ray Examinations (흉부 X선 촬영 시 산란선 분포 연구)

  • Cho, Pyong-Kon
    • The Journal of the Korea Contents Association
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    • v.12 no.7
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    • pp.255-260
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    • 2012
  • This study aims to examine the generation of scatter rays by dividing it into the presence of the subject at the chest X-ray examination, the X-ray tube and detector in the X-ray room, the front of the patient window, the outside of the entrance door of the patient waiting room, opening of the entrance door, the outside of the radiological technologist's entrance door, and the opening of the radiological technologist's entrance door, etc. When there is a subject, as the subject is thicker, more scatter rays occur at each of the spots for measurement. And when the entrance door is closed at the measurement, fewer scatter rays are generated.

A Study on the Prevention of Healthcare Associated Infection in Chest PA Projection of Contact Infected Patients (접촉성 감염환자 흉부검사 시 의료관련감염 예방에 대한 연구)

  • Lee, Sang-Won;Kim, Dong-Jin;Lee, Bae-Won
    • Journal of radiological science and technology
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    • v.41 no.4
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    • pp.297-304
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    • 2018
  • This study proposes measures and methods to reduce healthcare associated infections by comparing and analyzing the bacterial contamination level before and after putting on personal protective equipment (PPE) on the test equipment and the contact infected patients getting chest PA projections. Among the 50 inpatients who were diagnosed with C. difficile, MRSA, and VRE, 28 patients who were instructed to undergo chest PA projection and follow-up were chosen, The 3 parts that come in contact with the detector, chin, chest, and hands, were designated for all, and the bacterial contamination level before and after disinfection and before and after putting PPE was determined. Statistical analysis was performed using Medcalc version 14, and quantitative analysis was performed using paired student t-test, with statistical significance being noted at p<0.05. Results for the comparison of the mean values before and after disinfection of the detector, chin (3.000), chest (2.000), and hands (3.430), showed that the number of bacteria after disinfection was lower than it was before disinfection. Analyzing for each part before and after disinfection, there were statistically significant differences for the chin, chest, and hands (p<0.01). Results for the comparison of the mean values before and after putting on PPE, chin (2.202), chest (2.140), and hands (4.213), showed that the number of bacteria after putting on PPE was lower than it was before putting on PPE. Analyzing for each part before and after putting on PPE, there were statistically significant differences for the chin, chest, and hands (p<0.03). As a result, it was confirmed that the number of bacteria after putting on PPE was lower than it was before putting it on. In the future, expanding the research scope for contact infected patients will establish standards for quarantine guidelines depending on the way it spreads, and contribute to the prevention of healthcare associated infections.

Radiological Measurements of Lung Field Size in Normal Korean using Digital Chest Posteroanterior Radiography (디지털 흉부 후·전 방향 방사선영상을 이용한 정상 한국인 폐 크기의 영상의학적 계측)

  • Park, Yeo-Jin;Joo, Young-Cheol;Lee, Il-Soo
    • Journal of radiological science and technology
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    • v.41 no.1
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    • pp.1-6
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    • 2018
  • The purpose of this study is to provide baseline data on lung field size measured radiological method by chest PA image in normal Korean. The subject of this study is 496 normal persons who performed chest PA examination using x-ray digital radiography system. The measurement method is from the apex of right and left lung to the costophrenic angle of both lung, from the top of the image to the lowest costophrenic angle of both lung and transverse line of the largest lung area. As a result of this study, the following conclusions were obtained. A lung field size of male is larger than the female(p<0.05). The younger the age, the longer both lung length and total lung height statistically significant. As a increase height and length, A lung field size was increased(p<0.05). But, BMI is not associated with a lung field size. This study will be data of reference data when radiological technologists perform chest PA examination.

Chest radiographs and computed tomography scans in children with airway foreign body (기도 내 이물질 소아에서 단순 흉부방사선사진과 가슴 전산화단층촬영)

  • Park, Yu Mi;Kim, Kyunghoon;Lee, Hye Jin;Lee, Eu Kyoung;Yang, Eun Ae;Kim, Hwan Soo;Chun, Yoon Hong;Yoon, Jong-Seo;Im, Soo Ah;Kim, Hyun Hee;Kim, Jin Tack
    • Allergy, Asthma & Respiratory Disease
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    • v.6 no.5
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    • pp.241-247
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    • 2018
  • Purpose: This study aimed to evaluate the diagnostic value of radiologic findings in children with suspected foreign body aspiration. Methods: A retrospective medical chart review was done on 32 children with suspected foreign bodies in terms of age, sex, symptoms, signs, bronchographic findings, and type and location of foreign bodies. The diagnostic value of radiography was analyzed: 29 with chest anteroposterior (AP) or posteroanterior (PA) view, 23 with chest lateral decubitus view, 27 with chest computed tomography (CT), 29 with chest AP, PA or chest lateral decubitus view, and 25 with bronchoscopy. Results: As a measure for detecting foreign body aspiration, the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of radiologic findings were: chest AP or PA view, 50%, 100%, 100%, 29.4%, and 58.6%, respectively; chest lateral decubitus view, 57.9%, 50.0%, 84.6%, 20.0%, and 56.5%, respectively; chest AP, PA or chest lateral decubitus view, 69.6%, 66.7%, 88.8%, 36.4%, and 69.0%, respectively; and chest CT, 100.0%, 85.7%, 95.2%, 100.0%, and 96.2%, respectively. Conclusion: There is clinical benefit to take chest radiographs to diagnose foreign body aspiration. However, based on the results of this study, it may be not necessary to take chest lateral decubitus to diagnose foreign body aspiration. If chest radiographs show unilateral hyperinflation, foreign body aspiration can be diagnosed. In cases of normal chest radiography and history of a witnessed choking episode combined with positive signs, the diagnosis of airway foreign body aspiration should be made by using chest CT.

The Effect of the Chest Physiotherapy in Brain Injury Patients (뇌손상 환자에게 적용한 흉부물리요법의 비교연구)

  • Hong, Hae-Sook;Choi, Young-Jin
    • Journal of Korean Biological Nursing Science
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    • v.6 no.2
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    • pp.19-30
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    • 2004
  • The purpose of this study was to compare chest percussion with chest vibration in brain injury patients. 30 patients in SICU of one general hospital in T city were randomely divided by 3 groups and the arterial oxygen tension(PaO2) and the retained secretion were measured. The chest vibration was done among the first group, the chest vibration by hand after the chest percussion was done among the second group and the mechanical chest vibration after the chest percussion was done among the third group. The data was analyzed using SPSS 7.0(5% significance) and the results are below. 1) It was adopted the hypothesis that the amount of retained secretion of endotracheal suction after stopping the actions among the first, second and the third groups is different from each other.(F=41.62, p=0.00) 2) It was rejected the hypothesis that the arterial oxygen tension(PaO2)s are different from each other among the first, second and third group.(F=1.22, p=0.31) The amount of the retained secretion after chest percussion, chest vibration by hand or mechanical chest vibration was significantly different from each other. Therefore, chest physiotherapy could be regarded as the effective nursing intervention for the unconscieus patients who have the inappropriate airway cleaness and it was more effective to be together than to be alone.

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