PURPOSE: A diagnostic image producing method, an apparatus for performing the method, and a medical image system are provided to produce the ultrasonic image accurately even when the temperature of the subject is not uniform, by using an echo signal which is reflected from the subject.CONSTITUTION: A transducer(110) transmits a transmission signal to a first direction toward a subject, and receives an echo signal which is reflected from the subject. A RF frame acquisition unit(120) obtains more than two RF frames which include a first RF frame and a second RF frame, from the echo signal. A displacement estimation unit(130) estimates a second direction displacement which shows the extent moved from the second RF frame to a second direction. An image producing unit(140) produces the ultrasonic image which corresponds to the second RF frame. An error correcting unit(150) corrects an error of the ultrasonic image which is produced by using the estimated second direction displacement.COPYRIGHT KIPO 2013[Reference numerals] (110) One or more transducers (120) RF frame acquisition unit (130) Displacement estimation unit (140) Image producing unit (150) Error correcting unit (200) Ultrasonic device for treatment (AA) Object진단영상을 생성하는 방법은 피사체에 대하여 송신신호를 송신하고, 피사체로부터 반사된 에코신호로부터 제1 RF 프레임 및 제2 RF 프레임을 획득하고, 제1 RF 프레임에 나타난 피사체의 제1 지점이 제2 RF 프레임에서 이동된 정도를 나타내는 제2 방향 변위를 추정하고, 제2 RF 프레임에 대응하는 초음파 영상을 생성하고, 제2 방향 변위를 이용하여, 초음파 영상의 오차를 보정한다.
