My father aged 55yrs having diabetes ,bp,went for cardiac checkup 10days back,there ecg abnormal,2d echo normal,tmt report positive,given clopitab 75mg,and regular medicine for bp, diabetes,they adviced to do angiogram ,but he has no chest pain no symptoms daily walking ,can we again test for CT angio i.e done by giving barium dye,because in that the calcium score is negative then we can know that there is less risk for cardiac arrest, Want opinion regarding this