Automatic slice-alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertension
We propose a new automatic slice-alignment method, which enables right ventricular scan planning in addition to the left ventricular scan planning developed in our previous work, to simplify right ventricular cardiac scan planning and assess its accuracy and the clinical acceptability of the acquire...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
AIP Publishing LLC
2015-09-01
|
| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.4932210 |
| _version_ | 1811271926818013184 |
|---|---|
| author | Kenichi Yokoyama Shuhei Nitta Shigehide Kuhara Rieko Ishimura Toshiya Kariyasu Masamichi Imai Toshiaki Nitatori Tomoyuki Takeguchi Taichiro Shiodera |
| author_facet | Kenichi Yokoyama Shuhei Nitta Shigehide Kuhara Rieko Ishimura Toshiya Kariyasu Masamichi Imai Toshiaki Nitatori Tomoyuki Takeguchi Taichiro Shiodera |
| author_sort | Kenichi Yokoyama |
| collection | DOAJ |
| description | We propose a new automatic slice-alignment method, which enables right ventricular scan planning in addition to the left ventricular scan planning developed in our previous work, to simplify right ventricular cardiac scan planning and assess its accuracy and the clinical acceptability of the acquired imaging planes in the evaluation of patients with pulmonary hypertension. Steady-state free precession (SSFP) sequences covering the whole heart in the end-diastolic phase with ECG gating were used to acquire 2D axial multislice images. To realize right ventricular scan planning, two morphological feature points are added to be detected and a total of eight morphological features of the heart were extracted from these series of images, and six left ventricular planes and four right ventricular planes were calculated simultaneously based on the extracted features. The subjects were 33 patients (25 with chronic thromboembolic pulmonary hypertension and 8 with idiopathic pulmonary arterial hypertension). The four right ventricular reference planes including right ventricular short-axis, 4-chamber, 2-chamber, and 3-chamber images were evaluated. The acceptability of the acquired imaging planes was visually evaluated using a 4-point scale, and the angular differences between the results obtained by this method and by conventional manual annotation were measured for each view. The average visual scores were 3.9±0.4 for short-axis images, 3.8±0.4 for 4-chamber images, 3.8±0.4 for 2-chamber images, and 3.5±0.6 for 3-chamber images. The average angular differences were 8.7±5.3, 8.3±4.9, 8.1±4.8, and 7.9±5.3 degrees, respectively. The processing time was less than 2.5 seconds in all subjects. The proposed method, which enables right ventricular scan planning in addition to the left ventricular scan planning developed in our previous work, can provide clinically acceptable planes in a short time and is useful because special proficiency in performing cardiac MR for patients with right ventricles of various sizes and shapes is not required. |
| first_indexed | 2024-04-12T22:30:56Z |
| format | Article |
| id | doaj.art-d27260a642b54ef98f808f25d8c2b18e |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-04-12T22:30:56Z |
| publishDate | 2015-09-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-d27260a642b54ef98f808f25d8c2b18e2022-12-22T03:13:59ZengAIP Publishing LLCAIP Advances2158-32262015-09-0159097182097182-910.1063/1.4932210102509ADVAutomatic slice-alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertensionKenichi Yokoyama0Shuhei Nitta1Shigehide Kuhara2Rieko Ishimura3Toshiya Kariyasu4Masamichi Imai5Toshiaki Nitatori6Tomoyuki Takeguchi7Taichiro Shiodera8Department of Radiology, Kyorin University School of Medicine 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, JapanMultimedia Laboratory, Corporate Research & Development Center, Toshiba Corporation 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, JapanApplication Research Group, Clinical Application Research and Development Department, Center for Medical Research and Development, Toshiba Medical Systems Corporation 1385 Shimoishigami, Otawara-shi, Tochigi 324-8550, JapanDepartment of Radiology, Kyorin University School of Medicine 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, JapanDepartment of Radiology, Kyorin University School of Medicine 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, JapanDepartment of Radiology, Kyorin University School of Medicine 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, JapanDepartment of Radiology, Kyorin University School of Medicine 6-20-2 Shinkawa, Mitaka-shi, Tokyo 181-8611, JapanMultimedia Laboratory, Corporate Research & Development Center, Toshiba Corporation 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, JapanMultimedia Laboratory, Corporate Research & Development Center, Toshiba Corporation 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 212-8582, JapanWe propose a new automatic slice-alignment method, which enables right ventricular scan planning in addition to the left ventricular scan planning developed in our previous work, to simplify right ventricular cardiac scan planning and assess its accuracy and the clinical acceptability of the acquired imaging planes in the evaluation of patients with pulmonary hypertension. Steady-state free precession (SSFP) sequences covering the whole heart in the end-diastolic phase with ECG gating were used to acquire 2D axial multislice images. To realize right ventricular scan planning, two morphological feature points are added to be detected and a total of eight morphological features of the heart were extracted from these series of images, and six left ventricular planes and four right ventricular planes were calculated simultaneously based on the extracted features. The subjects were 33 patients (25 with chronic thromboembolic pulmonary hypertension and 8 with idiopathic pulmonary arterial hypertension). The four right ventricular reference planes including right ventricular short-axis, 4-chamber, 2-chamber, and 3-chamber images were evaluated. The acceptability of the acquired imaging planes was visually evaluated using a 4-point scale, and the angular differences between the results obtained by this method and by conventional manual annotation were measured for each view. The average visual scores were 3.9±0.4 for short-axis images, 3.8±0.4 for 4-chamber images, 3.8±0.4 for 2-chamber images, and 3.5±0.6 for 3-chamber images. The average angular differences were 8.7±5.3, 8.3±4.9, 8.1±4.8, and 7.9±5.3 degrees, respectively. The processing time was less than 2.5 seconds in all subjects. The proposed method, which enables right ventricular scan planning in addition to the left ventricular scan planning developed in our previous work, can provide clinically acceptable planes in a short time and is useful because special proficiency in performing cardiac MR for patients with right ventricles of various sizes and shapes is not required.http://dx.doi.org/10.1063/1.4932210 |
| spellingShingle | Kenichi Yokoyama Shuhei Nitta Shigehide Kuhara Rieko Ishimura Toshiya Kariyasu Masamichi Imai Toshiaki Nitatori Tomoyuki Takeguchi Taichiro Shiodera Automatic slice-alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertension AIP Advances |
| title | Automatic slice-alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertension |
| title_full | Automatic slice-alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertension |
| title_fullStr | Automatic slice-alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertension |
| title_full_unstemmed | Automatic slice-alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertension |
| title_short | Automatic slice-alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertension |
| title_sort | automatic slice alignment method in cardiac magnetic resonance imaging for evaluation of the right ventricle in patients with pulmonary hypertension |
| url | http://dx.doi.org/10.1063/1.4932210 |
| work_keys_str_mv | AT kenichiyokoyama automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension AT shuheinitta automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension AT shigehidekuhara automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension AT riekoishimura automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension AT toshiyakariyasu automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension AT masamichiimai automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension AT toshiakinitatori automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension AT tomoyukitakeguchi automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension AT taichiroshiodera automaticslicealignmentmethodincardiacmagneticresonanceimagingforevaluationoftherightventricleinpatientswithpulmonaryhypertension |