{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,7,30]],"date-time":"2025-07-30T16:14:56Z","timestamp":1753892096689,"version":"3.41.2"},"reference-count":42,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2022,10,19]],"date-time":"2022-10-19T00:00:00Z","timestamp":1666137600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Physiol."],"abstract":"<jats:p><jats:bold>Aims:<\/jats:bold> Gross pathology inspection (patho) is the gold standard for the morphological evaluation of focal myocardial pathology. Examination with 9.4\u00a0T magnetic resonance imaging (MRI) is a new method for very accurate display of myocardial pathology. The aim of this study was to demonstrate that lesions can be measured on high-resolution MRI images with the same accuracy as on pathological sections and compare these two methods for the evaluation of radiofrequency (RF) ablation lesion dimensions in swine heart tissue during animal experiment.<\/jats:p><jats:p><jats:bold>Methods:<\/jats:bold> Ten pigs underwent radiofrequency ablations in the left ventricle during animal experiment. After animal euthanasia, hearts were explanted, flushed with ice-cold cardioplegic solution to relax the whole myocardium, fixed in 10% formaldehyde and scanned with a 9.4\u00a0T magnetic resonance system. Anatomical images were processed using ImageJ software. Subsequently, the hearts were sliced, slices were photographed and measured in ImageJ software. Different dimensions and volumes were compared.<\/jats:p><jats:p><jats:bold>Results:<\/jats:bold> The results of both methods were statistically compared. Depth by MRI was 8.771 \u00b1 2.595\u00a0mm and by patho 9.008 \u00b1 2.823 mm; <jats:italic>p<\/jats:italic> = 0.198. Width was 10.802 \u00b1 2.724\u00a0mm by MRI and 11.125 \u00b1 2.801\u00a0mm by patho; <jats:italic>p<\/jats:italic> = 0.049. Estuary was 2.006 \u00b1 0.867\u00a0mm by MRI and 2.001 \u00b1 0.872\u00a0mm by patho; <jats:italic>p<\/jats:italic> = 0.953. The depth at the maximum diameter was 4.734 \u00b1 1.532\u00a0mm on MRI and 4.783 \u00b1 1.648\u00a0mm from the patho; <jats:italic>p<\/jats:italic> = 0.858. The volumes of the lesions calculated using a formula were 315.973 \u00b1 257.673\u00a0mm<jats:sup>3<\/jats:sup> for MRI and 355.726 \u00b1 255.860\u00a0mm<jats:sup>3<\/jats:sup> for patho; <jats:italic>p<\/jats:italic> = 0.104. Volume directly measured from MRI with the \u201cpoint-by-point\u201d method was 671.702 \u00b1 362.299\u00a0mm<jats:sup>3<\/jats:sup>.<\/jats:p><jats:p><jats:bold>Conclusion:<\/jats:bold> Measurements obtained from gross pathology inspection and MRI are fully comparable. The advantage of MRI is that it is a non-destructive method enabling repeated measurements in all possible anatomical projections.<\/jats:p>","DOI":"10.3389\/fphys.2022.834328","type":"journal-article","created":{"date-parts":[[2022,10,19]],"date-time":"2022-10-19T04:47:16Z","timestamp":1666154836000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Comparison of gross pathology inspection and 9.4\u00a0T magnetic resonance imaging in the evaluation of radiofrequency ablation lesions in the left ventricle of the swine heart"],"prefix":"10.3389","volume":"13","author":[{"given":"Eva","family":"Odehnalov\u00e1","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lucia","family":"Val\u00edkov\u00e1","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guido","family":"Caluori","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tom\u00e1\u0161","family":"Kul\u00edk","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Veronika","family":"\u0158\u00edmalov\u00e1","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tomasz","family":"Jadczyk","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Eva","family":"Dra\u017eanov\u00e1","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Iveta","family":"Pavlova","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martin","family":"Pe\u0161l","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"V\u00e1clav","family":"Kube\u0161","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zden\u011bk","family":"St\u00e1rek","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2022,10,19]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"249","DOI":"10.1161\/CIRCEP.109.868356","article-title":"Evaluation of left atrial lesions after initial and repeat atrial fibrillation ablation: Lessons learned from delayed-enhancement MRI in repeat ablation procedures","volume":"3","author":"Badger","year":"2010","journal-title":"Circ. 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