Powershell - Test-Path if a file exists within a folder

Question

Hey Guys,
I'm unable to get this to work correctly. I'm trying to see which folders have a file within them with the word "preview".  If it does, then tell me it exists, if not, then it doesn't exist.
What am I missing?!? Ugh :(
Here is my code
$rootpath = "T:\Path1\Path2\*"
foreach ($f in Get-ChildItem $rootpath)
foreach ($i in Get-ChildItem $f)
if (Test-Path $i -include *preview*.jpg)
echo($i.name + " Preview Exists")
else
echo($i.name + " ***PREVIEW MISSING***")

Answer 1

this script is only 1/2 working.
I tested it with "t:\path1\path2\folder1\subfolder1, subfolder2, subfolder3 where preview1.jpg is n subfolder1"
But, "t:\path1\path2\folder2\subfolder1\preview2.jpg is ignored
foreach ($i in (Get-ChildItem $f |? {$_.psiscontainer))  should be
foreach ($i in (Get-ChildItem $f |? {$_.psiscontainer}))
$rootpath = "T:\Path1\Path2\*"
$results = @()
foreach ($f in Get-ChildItem $rootpath)
 foreach ($i in (Get-ChildItem $f |? {$_.psiscontainer))
 $result = "" | select File,PreviewStatus
 $result.file = $i.fullname
  if (Test-Path  ($i.fullname + "\*preview*.jpg"))
   echo($i.name + "           Preview Exists")
   $result.PreviewStatus = "Preview Exists"
  else
   echo($i.name + " ***PREVIEW MISSING***")
   $result.previewstatus = "Preview Missing"
$results += $result
$results | export-csv Preview_Status.csv -notype
jon