Q: Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
Abstract: CT scans were obtained in five patients who presented with abdominal pain and were found to have an abdominal aortic aneurysm without evidence of hypovolaemia. A periaortic haematoma and evidence of a rupture was found on scanning in three of the patients and confirmed at immediate operation. A retrospective diagnosis of rapidly expanding (acute) aneurysm was made in the other two patients in whom no other pathology was found at early elective operation. CT scanning is useful in differentiating small well-controlled ruptures from rapidly expanding aneurysms.
Which is the apt title for the abstract? option1: Differentiation of ruptured aortic aneurysm from acute expansion by computerised tomography. option2: Constant velocity dynamometer: an appraisal using mechanical loading.
A:
Differentiation of ruptured aortic aneurysm from acute expansion by computerised tomography.