A phantom study showing the importance of compression in conventional diagnostic X-ray examinations

Aurumskjöld, Marie-Louise; Tingberg, Anders; Mattsson, Sören

doi:10.1093/rpd/ncq082

Cited by 6 publications

(20 citation statements)

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“…We performed a median of 10 measurements with an intercostal approach, in liver segments VII/VIII, at depths of 3À5 cm beneath the liver capsule (Dietrich et al 2017;Ferraioli et al 2015). It is known from X-ray examinations that compression reduces attenuation and increases image quality (Olsson et al 2010;Piippo-Huotari et al 2018;Rubin et al 1979). Proximity to the liver capsule is a key factor in securing reliable SWE results, as ultrasound waves in subcutaneous fat attenuate differently (Mast et al 1999), measurement depth affects SWE result reliability (Zhao et al 2011), and ARFIs attenuate more rapidly in subcutaneous fat than in other tissues (Barr et al 2016;Barry et al 2012).…”

Section: Discussionmentioning

confidence: 99%

Influence of Probe Pressure on Ultrasound-Based Shear Wave Elastography of the Liver Using Comb-Push 2-D Technology

Byenfeldt

Elvin

Fransson

2019

Ultrasound in Medicine & Biology

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It has been postulated that in the liver, applying increased probe pressure during ultrasound-based shear wave elastography (SWE) might lead to a false increase in the SWE result. We aimed to determine the influence of increased intercostal probe pressure when performing SWE of the liver. We also investigated the number of measurements required to achieve technically successful and reliable SWE examinations. This prospective, clinical study included 112 patients and 2240 SWE measurements of the liver. We applied probe pressure intercostally, to reduce the skin-to-liver capsule distance (SCD), which could stabilize the SWE signal and thus increase the number of technically successful measurements. We performed 10 measurements with maximum probe pressure and 10 with normal pressure in each patient. Thus, two analysis groups were compared for differences. Compared with normal pressure, maximum probe pressure significantly reduced the SCD (p < 0.001) and significantly increased the number of technically successful measurements from 981 to 1098, respectively (p < 0.001). The SWE results with normal and maximum probe pressure were 5.96 kPa (interquartile range: 2.41) and 5.45 kPa (interquartile range: 1.96), respectively (p < 0.001). In obese patients, a large SCD poses a diagnostic challenge for ultrasound SWE. We found that maximum intercostal probe pressure could reduce the SCD and increase the number of technically successful measurements, without falsely increasing the SWE result. Only three measurements were required to achieve technically successful and reliable SWE examinations.

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Section: Discussionmentioning

confidence: 99%

Influence of Probe Pressure on Ultrasound-Based Shear Wave Elastography of the Liver Using Comb-Push 2-D Technology

Byenfeldt

Elvin

Fransson

2019

Ultrasound in Medicine & Biology

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“…Prone compression is most frequently used, because it is simple. However, previous research has identified that it is not as effective as compression in the supine position (Piippo‐Huotari, Norrman, Anderzén‐Carlsson & Geijer, ; Olsson et al, ) and not all examinations can be done with the patient in the prone position. For thin patients, it has been shown that there is no compression at all in the prone position (Olsson et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…However, previous research has identified that it is not as effective as compression in the supine position (Piippo‐Huotari, Norrman, Anderzén‐Carlsson & Geijer, ; Olsson et al, ) and not all examinations can be done with the patient in the prone position. For thin patients, it has been shown that there is no compression at all in the prone position (Olsson et al, ). Despite benefits, compression can be experienced as painful and anxiety provoking and one study identified that reduced compression during digital breast tomosynthesis decreased both pain and anxiety, with maintained image quality (Abdullah Suhaimi, Mohamed, Ahmad, & Chelliah, ).…”

Section: Introductionmentioning

confidence: 99%

“…Research has shown that compression of a few centimetres can halve radiation dose. Compression is also used to improve image quality (Olsson, Tingberg, & Mattsson, ). There are traditionally two ways to compress the abdomen: one is that the radiographer adds a compression band across the abdomen and the other is that the patient is lying in a prone position.…”

Section: Introductionmentioning

confidence: 99%

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Patients' and radiographers' experiences of dose reducing abdominal compression in radiographic examinations—A qualitative study

et al. 2020

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Aim To describe patients' and radiographers' experiences of abdominal compression using conventional and patient‐controlled compression methods. Design Qualitative descriptive design. Methods Forty‐five patients who had used both a conventional and a patient‐controlled compression device answered questionnaires. Five radiographers were interviewed. The data‐collection took place between September 2015 and February 2017. Data were analysed by qualitative content analysis. Results Patient‐controlled compression was preferred by slightly more patients because of fear of pain due to excessively hard pressure, maintaining control over the pressure and shorter duration. It was more comfortable, and patients felt they could participate in the examinations. Conventional compression was preferred by some because of more stable pressure and uncertainty of own capacity to provide the optimal compression. Discomfort was more often mentioned concerning the conventional compression method. The radiographers experienced the patient‐controlled method as less time‐consuming and more comfortable, but uncertainty about correct compression technique and its effect on radiation dose and image quality was reported.

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“…Reduction of radiation doses and better image quality requires radiographers to use optimized methods such as compression (6,7). The image quality improves with compression because soft tissue is displaced sideways, a thinner body part requires less exposure, and scattered radiation is decreased (7). reduced in recent years in conventional X-ray examinations (3,(7)(8)(9)(10).…”

Section: Introductionmentioning

confidence: 99%

New patient-controlled abdominal compression method in radiography: radiation dose and image quality

Piippo-Huotari

Norrman

Anderzén‐Carlsson

et al. 2018

Acta Radiologica Open

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BackgroundThe radiation dose for patients can be reduced with many methods and one way is to use abdominal compression. In this study, the radiation dose and image quality for a new patient-controlled compression device were compared with conventional compression and compression in the prone position.PurposeTo compare radiation dose and image quality of patient-controlled compression compared with conventional and prone compression in general radiography.Material and MethodsAn experimental design with quantitative approach. After obtaining the approval of the ethics committee, a consecutive sample of 48 patients was examined with the standard clinical urography protocol. The radiation doses were measured as dose-area product and analyzed with a paired t-test. The image quality was evaluated by visual grading analysis. Four radiologists evaluated each image individually by scoring nine criteria modified from the European quality criteria for diagnostic radiographic images.ResultsThere was no significant difference in radiation dose or image quality between conventional and patient-controlled compression. Prone position resulted in both higher dose and inferior image quality.ConclusionPatient-controlled compression gave similar dose levels as conventional compression and lower than prone compression. Image quality was similar with both patient-controlled and conventional compression and was judged to be better than in the prone position.

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A phantom study showing the importance of compression in conventional diagnostic X-ray examinations

Cited by 6 publications

References 1 publication

Influence of Probe Pressure on Ultrasound-Based Shear Wave Elastography of the Liver Using Comb-Push 2-D Technology

Influence of Probe Pressure on Ultrasound-Based Shear Wave Elastography of the Liver Using Comb-Push 2-D Technology

Patients' and radiographers' experiences of dose reducing abdominal compression in radiographic examinations—A qualitative study

New patient-controlled abdominal compression method in radiography: radiation dose and image quality

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