Novel Pulmonary Circulation Imaging Using Dynamic Chest Radiography for Acute Pulmonary Embolism

Miyatake, Hidemitsu; Asada, Kohei; Tabata, Toshihide; Eguchi, Yawara; Matsutani, Noritugu; Nakagawa, Yoshihisa

doi:10.1253/circj.cj-20-1259

Cited by 5 publications

(4 citation statements)

References 1 publication

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“…Up to now, research on DCR has mainly been performed in the respiratory field, but in the cardiovascular field, several reports have shown that DCR can be used to evaluate pulmonary circulation. 12,13,15- 17 In this study, we demonstrated that cardiac function can also be evaluated DCR by measuring the %∆pixel values at the left edge of the heart.…”

Section: Discussionmentioning

confidence: 76%

“…16 Several other reports have shown that DCR enables diagnosis of pulmonary embolism in humans using the same method. [17][18][19][20] In terms of cardiac function, the EF of a heart phantom model correlated with the pixel value obtained by DCR. 10 However, there are no reports of evaluating cardiac EF in humans or animals using DCR, so our aim in the present study was to identify whether there is a relationship between LVEF and the magnitude of change in the pixel values on DCR in the left heart field and whether it is possible to detect patients with reduced LVEF using DCR.…”

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confidence: 71%

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Discriminative Ability of Dynamic Chest Radiography to Identify Left Ventricular Dysfunction

Okamoto,

Miyatake,

Kodama

et al. 2023

Circ J

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Background: Dynamic chest radiography (DCR) produces sequential radiographs within a short examination time. It is also inexpensive and only uses a low dose of radiation. Because of the lack of reports of evaluating cardiac function using DCR in humans, we investigated its discriminative ability for left ventricular (LV) dysfunction in a study cohort. Methods and Results:We analyzed the DCR pixel values of 4 circular regions of interest (ROIs) in the hearts of 61 patients with cardiovascular disease and 10 healthy volunteers. We evaluated the relationship between changes in pixel value in the heart and the LV ejection fraction (LVEF) by echocardiography. We constructed receiver operating characteristic (ROC) curves to evaluate whether the percent change in pixel value (%∆pixel value) could be used to identify patients with reduced LVEF. A total of 21 patients had reduced LVEF (LVEF <50%), and 40 had preserved LVEF (LVEF ≥50%). The correlation between LVEF and %∆pixel value in each ROI was significant, and the area under the ROC curve of the %∆pixel values for identifying patients with reduced LVEF was satisfactory (0.808-0.827) in 3 ROIs where the entire circular area was within the cardiac shadow.Conclusions: LV dysfunction can be detected by changes in the pixel value on DCR.

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Section: Discussionmentioning

confidence: 76%

mentioning

confidence: 71%

Discriminative Ability of Dynamic Chest Radiography to Identify Left Ventricular Dysfunction

Okamoto,

Miyatake,

Kodama

et al. 2023

Circ J

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“…While multiple case reports have explored the utility of DCR to demonstrate V/Q mismatch, the lack of large-scale studies comparing it to gold-standard techniques limits its current use [ 43 – 46 ]. Among patients with pulmonary disease, DCR was found to have an accuracy of 62.3% in detecting V/Q mismatch compared to nuclear medicine scanning [ 26 ].…”

Section: Resultsmentioning

confidence: 99%

Dynamic chest radiography: a state-of-the-art review

et al. 2023

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Dynamic chest radiography (DCR) is a real-time sequential high-resolution digital X-ray imaging system of the thorax in motion over the respiratory cycle, utilising pulsed image exposure and a larger field of view than fluoroscopy coupled with a low radiation dose, where post-acquisition image processing by computer algorithm automatically characterises the motion of thoracic structures. We conducted a systematic review of the literature and found 29 relevant publications describing its use in humans including the assessment of diaphragm and chest wall motion, measurement of pulmonary ventilation and perfusion, and the assessment of airway narrowing. Work is ongoing in several other areas including assessment of diaphragmatic paralysis. We assess the findings, methodology and limitations of DCR, and we discuss the current and future roles of this promising medical imaging technology.Critical relevance statement Dynamic chest radiography provides a wealth of clinical information, but further research is required to identify its clinical niche. Graphical abstract

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“…Additionally, a significant correlation was observed between the calculated left and right BFR using the method employed in the study and PPS results ( 8 , 10 ). DPDR is useful for diagnosing chronic thromboembolic pulmonary hypertension (CTEPH) ( 11 ), distinguishing between pulmonary arterial and CTEPH ( 12 ), and evaluating thrombus reduction assessment ( 13 ). DCR and standard chest radiography can be performed simultaneously owing to similar setups.…”

Section: Introductionmentioning

confidence: 99%

Relationship between pulmonary blood flow and volume following lung resection using dynamic perfusion digital radiography

Hanaoka,

Hayashi,

Shiratori

et al. 2023

J Thorac Dis

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Background Surgical intervention for lung resection can cause ventilation-perfusion mismatches and affect gas exchange; however, minimally invasive assessment of blood flow is difficult. This study aimed to evaluate changes in pulmonary blood flow after radical lung cancer surgery using a minimally invasive dynamic digital chest radiography system. Methods We evaluated 64 patients who underwent radical lobectomies. Postoperative changes in pulmonary blood flow, assessed using dynamic chest radiography-based blood flow ratios (BFRs), were compared with the temporal evolution of both functional lung volumes (FLVs) and estimated lung weight (ELW) derived from computed tomography (CT) volumetry. Results FLVs on the affected side gradually recovered over time from the lowest value observed 3 months after surgery in all procedures. BFRs on the affected side also showed a gradual recovery from the lowest value 1 month after surgery, except for left upper lobectomies (LULs). In LULs, FLVs and ELWs increased proportionally up to 3 months after surgery, with lung volumes continuing to increase thereafter. The recovery of BFRs differed depending on the resected lobe. Conclusions A relationship between pulmonary blood flow and FLV was observed in the postoperative period. Despite varying compensatory responses depending on the surgical procedure, FLV recovery coincided with increased pulmonary blood flow.

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Novel Pulmonary Circulation Imaging Using Dynamic Chest Radiography for Acute Pulmonary Embolism

Cited by 5 publications

References 1 publication

Discriminative Ability of Dynamic Chest Radiography to Identify Left Ventricular Dysfunction

Discriminative Ability of Dynamic Chest Radiography to Identify Left Ventricular Dysfunction

Dynamic chest radiography: a state-of-the-art review

Relationship between pulmonary blood flow and volume following lung resection using dynamic perfusion digital radiography

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