when i close the modal, checked inputs became unchecked

i use input with checkbox type to narrow my search result; problem is i put the checkboxes in to the modal and when i checked many of them and close the modal the checked inputs become unchecked .

and i want every time that i open the modal input checked been checked.

 var filterTemps = [
        "partial/uicomponent/mdlFilters/mdl.estateType.filter.html",
    ];

    $scope.showReleventMdl = function(num){

        var filtersModal = $modal({
            backdrop:true,
            placement:'top',
            templateUrl :  filterTemps[num],
            controller : 'filterCtrl',
            show: false
        });

        filtersModal.$promise.then(filtersModal.show);
    };

<!-- trigger the function for call modal -->
 <ul class="nav navbar-nav">
   <li>
     <a href="" ng-click="showReleventMdl(0)" ng-bind="string.pages.form.estateType"></a>
     </li>
   ...
</ul>
--------------------------------------------------
<!-- my Modal Template -->
<div class="modal-body">

                <ul class="filterList">
                    <li class="filterListItem half" ng-repeat="item in string.pages.mainPage.estateTypes">
                        <input id="estateType{{$index}}" ng-click="checked(item)" type="checkbox" class="filterCheck">
                        <label for="estateType{{$index}}" ng-bind="item"></label>
                    </li>
                </ul>

            </div>

i want to know is there any way to store checked inputs and bring them back in checked state with modal ? TNKS a lot