Talk of the top hospital in Massachusetts usually conjures images of the large, prominent academic medical centers in Boston.A new index that uses metrics not typically involved in hospital rankings bestows that designation somewhere else – namely, Leominster.The UMass Memorial HealthAlliance-Clinton Hospital campus in Leominster leads the state in the new Lown Institute Hospitals Index, a ranking of 3,300 hospitals and 300 hospital systems launched this summer. […]