1/2 Call this possible bluff?

[Grandezza]

Only thing I know about villain is that he just lead the turn into 3 opponents with a weak hand after flop was checked through in a raised pot. So it looks like he's betting a lot of flops and therefore I would expect him to bet a queen on the flop. Is this a strong enough read to call the river though?

Full Tilt Poker
Pot Limit Omaha Ring game
Blinds: $1/$2
6 players
Converter

Stack sizes:
Hero: $198.05
UTG+1: $107.80
CO: $194.50
Button: $151.25
SB: $176.10
BB: $270.85

Pre-flop: (6 players) Hero is UTG with A[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/heart.gif[/img] 4[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img]
<font color="#cc0000">Hero raises to $7</font>, 2 folds, Button calls, SB folds, BB calls.

Flop: Q[img]/images/graemlins/club.gif[/img] 2[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/heart.gif[/img] ($22, 3 players)
BB checks, Hero checks, Button checks.

Turn: 4[img]/images/graemlins/diamond.gif[/img] ($22, 3 players)
BB checks, <font color="#cc0000">Hero bets $16</font>, Button calls, BB folds.

River: T[img]/images/graemlins/diamond.gif[/img] ($54, 2 players)
Hero checks, <font color="#cc0000">Button bets $54</font>

[getitfixed]

Hard to say...If he's been leading thin, I think it's possible he will slowplay a big one...I think I call

[RichGangi]

I would make a crying call here. One of those nuts or nothing hands.

[alavet]

call
and then go abusing him in chat if you lost

[Jamougha]

He's betting a lot of flops, then he checks a perfect flop/situation for a bet. Hmm that's suspicious. Assume he would have bet a fd on the flop, for him to be bluffing here he needs to have like 356 and have called turn on paired board. Think he has slowplayed a Q much more often.

[iggymcfly]

God this sucks. You played the flop and turn perfectly to keep the pot small and now you're still in a tough spot on the river where you're probably going to have to fold to one bet. It would be a pretty strange line to bluff the river and not the flop here though, so I think you have to give him credit for a boat or quads most of the time. If you had a little stronger read that he was a clueless donkey who plays passive on the flop and never tries to steal until after he misses his draw, then it would probably be a call.

[Full-Metall]

is $30 blocking bet - folding to a raise, bad?