Myocardial mapping represents an evolution of cardiac magnetic resonance imaging (CMR), enabling a quantitative and reproducible assessment of myocardial tissue properties. T1 and T2 mapping techniques allow for the non-invasive identification of pathological processes such as fibrosis and edema, even in the absence of late gadolinium enhancement. The aim of this study was to establish physiological reference values for myocardial T1 and T2 mapping in healthy subjects using the GE 1.5 Tesla scanner at Rovigo Hospital, and to subsequently evaluate their applicability in patients with suspected cardiac diseases. One hundred healthy subjects (fifty men and fifty women) were enrolled and divided into five age groups (20–29, 30–39, 40–49, 50–59, and 60–69 years), selected according to strict inclusion and exclusion criteria. Image acquisition was performed using dedicated T1 and T2 mapping sequences, and the resulting maps were analyzed by placing regions of interest (ROIs) within myocardial segments according to the seventeen-segment model proposed by the American Heart Association (AHA). From each subject, T1 and T2 values were obtained and stratified by sex and age group, creating a local reference database. The obtained values were subsequently applied to a group of patients with suspected myocardial diseases, demonstrating a good ability to discriminate pathological tissue alterations and confirming the reliability of the database. This work represents the implementation of physiological myocardial mapping reference values at Rovigo Hospital, providing reliable local reference data for T1 and T2. The project, the result of extensive organizational and technical effort, constitutes a foundation for future studies and for a broader clinical application of cardiac magnetic resonance imaging.
Il mapping miocardico rappresenta un’evoluzione della risonanza magnetica cardiaca (CMR), consentendo una valutazione quantitativa e riproducibile delle proprietà tissutali del miocardio. Le tecniche di mapping T1 e T2 permettono di identificare in modo non invasivo processi patologici come fibrosi ed edema, anche in assenza di enhancement tardivo. Lo scopo di questo studio è stato quello di definire i valori fisiologici di riferimento per il mapping miocardico T1 e T2 in soggetti sani, utilizzando l’apparecchiatura GE 1.5 Tesla presso l’Ospedale di Rovigo, e di verificarne successivamente l’applicabilità nello studio di pazienti con sospette patologie cardiache. Sono stati arruolati cento soggetti sani (cinquanta uomini e cinquanta donne), suddivisi in cinque fasce d’età (20–29, 30–39, 40–49, 50–59 e 60–69 anni), selezionati secondo rigorosi criteri di inclusione ed esclusione. L’acquisizione delle immagini è stata eseguita utilizzando sequenze dedicate di mapping T1 e T2, e le mappe ottenute sono state elaborate mediante posizionamento di ROI nei segmenti miocardici secondo il modello a diciassette segmenti, proposto dall’ American Herat Association (AHA). Da ciascun paziente sono stati ricavati i valori di T1 e T2, distinti per sesso e fascia d’età, creando un database locale di riferimento. I valori ottenuti sono stati successivamente applicati a un gruppo di pazienti con sospette patologie miocardiche, mostrando una buona capacità di discriminare alterazioni tissutali patologiche e confermando l’affidabilità del database. Questo lavoro rappresenta un’implementazione dei valori fisiologici del mapping miocardico presso l’Ospedale di Rovigo, fornendo dati di riferimento locali affidabili per T1 e T2. Il progetto, frutto di un intenso impegno organizzativo e tecnico, costituisce uno sviluppo per futuri studi e per una più ampia applicazione clinica della risonanza magnetica cardiaca.
Rilevazione parametrica T1 e T2 mapping, su pazienti volontari sani, nella RM cardiaca: raccolta casistica, implementazione del protocollo e post processing
PENDINI, ELIA
2024/2025
Abstract
Myocardial mapping represents an evolution of cardiac magnetic resonance imaging (CMR), enabling a quantitative and reproducible assessment of myocardial tissue properties. T1 and T2 mapping techniques allow for the non-invasive identification of pathological processes such as fibrosis and edema, even in the absence of late gadolinium enhancement. The aim of this study was to establish physiological reference values for myocardial T1 and T2 mapping in healthy subjects using the GE 1.5 Tesla scanner at Rovigo Hospital, and to subsequently evaluate their applicability in patients with suspected cardiac diseases. One hundred healthy subjects (fifty men and fifty women) were enrolled and divided into five age groups (20–29, 30–39, 40–49, 50–59, and 60–69 years), selected according to strict inclusion and exclusion criteria. Image acquisition was performed using dedicated T1 and T2 mapping sequences, and the resulting maps were analyzed by placing regions of interest (ROIs) within myocardial segments according to the seventeen-segment model proposed by the American Heart Association (AHA). From each subject, T1 and T2 values were obtained and stratified by sex and age group, creating a local reference database. The obtained values were subsequently applied to a group of patients with suspected myocardial diseases, demonstrating a good ability to discriminate pathological tissue alterations and confirming the reliability of the database. This work represents the implementation of physiological myocardial mapping reference values at Rovigo Hospital, providing reliable local reference data for T1 and T2. The project, the result of extensive organizational and technical effort, constitutes a foundation for future studies and for a broader clinical application of cardiac magnetic resonance imaging.| File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/97071