Cardiothoracic ratio measurement using artificial intelligence: observer and method validation studies. - Pairash Saiviroonporn; Kanchanaporn Rodbangyang; Trongtum Tongdee; Warasinee Chaisangmongkon; Pakorn Yodprom; Thanogchai Siriapisith; Suwimon Wonglaksanapimon; Phakphoom Thiravit (BMC Medical Imaging, 2021)